Uppers Gun Parts

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Add the Colt legend of reliability to your rifle or build with these complete feature 1/7 RH twist in a chrome lined, button rifled barrel. Available with or without a charging handle, bolt carrier group, and back up sights. All NFA rules apply. NOTE: Does NOT include bolt carrier group, charging handle, or rear backup sight AR-15, Issue:11, Page:003 Big Book Catalog, Issue:72, Page:003 160-000-446WB

100040692 100-040-692WB M4A1 Stripped SOCOM Upper Receiver Handguard Only 14.5in Cartridge: 5.56x45 Finish: Flat Dark Earth Style: Stripped Length: 14.5" Muzzle: 1/2-28 Twist: 1-7 Description Specs Superior Specs. Ultimate Performance. The Daniel Defense M4A1 SOCOM Block II Upper Receiver has been designed for those looking to match the specs and performance on the M4A1 SOCOM Block II carbines used by troops during Operations Iraqi Freedom and Enduring Freedom.

The PWS MK1 PRO line features the PWS long stroke piston system. This line is perfect for shooters looking for a cost-effective piston system firearm without sacrificing the high quality standards PWS has been known for over a decade. Featuring a 3-setting adjustable gas system for users with suppressors, free-float MLOK handguard, Radian Raptor charging handle, extruded upper receiver that integrates an extremely solid handguard attachment system, the MK1 PRO line has an assortment of features ideal for shooters of all levels.

The FM Products Enhanced Upper Receiver with Forward Charging Handle sets itself apart from other PCC Uppers on the market. This upper has a unique Charging Handle, that is positioned much like an MP5, making operation of the Upper fast and simple, and allows the user to operate without moving out of a shooting position. The Enhanced Upper also includes a set of MLOK rail covers, ready to install! Barrels are black nitride for a robust and durable finish. Included Bolt is compatible with lowers that accept Glock®9mm Magazines. Handguards neatly extend close to the muzzle.

Item #: Start your Ar-15 build with a quality assembled upper receiver. Properly built and ready to go on your rifle. Features: 16″ 4150 CMV 223 Wylde barrel (shoots 556/223) 7075-t6 Aluminum forged milspec receiver, anodized black Carbine Gas, .750 steel gas block, a2 flash hider, 1/2-28 threads Dust cover, forward assist 12″ MLOK lightweight free float handguard ASSEMBLED, TEST-FIRED, AND QC’D IN-HOUSE

This BCA AR-15 complete .223 Wylde rifle length upper has a 20" government barrel and a black nitride finish, and features a 1:8 twist rate, with a rifle length gas system. It includes the new 15" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This .223 Wylde upper is compatible with any mil-spec AR-15 lower. More Information SKU 9310N-UA223WRGVNT2018M-15M3 Weight (lbs) 6.300000 Magazine Capacity N/A Length 20 Profile Government Twist 1:8 Finish Black Nitride Material 4150 Chrome Moly Vanadium

This BCA AR-15 complete 5.56 Nato rifle length upper has a 16" M4 contour barrel with a stainless steel finish, and features a 1:8 twist rate, with a carbine length gas system. It includes a 15" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a side charging (Gen 2) handle (patent pending). This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. This has the new handguard. More Information SKU 498N-UASCH556CM41618SS-15M3 Weight (lbs) 5.300000 Magazine Capacity N/A Length 16 Profile M4 Contour Twist 1:8 Finish Stainless

This Bear Creek Arsenal AR-15 Complete 7.62x39 rifle length upper has a 16" Cold Hammer Forged heavy barrel with a black nitride finish, and features a 1:10 twist rate, with a Carbine length gas system. It includes a Standard Handguard, Front Sight and Carry Handle, a M4 flat-top forged upper receiver, a BCA Bolt Carrier Group, Flash Hider, and a rear charging handle. This 7.62x39 upper is compatible with any mil-spec AR-15 lower. More Information SKU 9148-UA762CHB16110MHF-SHGFSCH Weight (lbs) 4.500000 Magazine Capacity N/A Length 16 Profile Heavy Barrel Twist 1:10

This BCA AR-15 complete 5.56 Nato pistol length upper has a 10.5" M4 contour barrel with a 416R Stainless Steel finish, and features a 1:7 twist rate, with a carbine length gas system. It includes the new 10" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. More Information SKU 508N-UASCH556CM410.517SS-10M3 Weight (lbs) 3.500000 Magazine Capacity N/A Length 10.5 Profile M4 Contour Twist 1:7 Finish Stainless

This BCA AR-15 complete .223 Wylde rifle length upper has an 18" heavy barrel with a 416R stainless finish, and features a 1:8 twist rate, with a mid-length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This .223 Wylde upper is compatible with any mil-spec AR-15 lower. This has the new handguard. Shop more .223 Wylde Uppers! Magazine not included. Check out Magazines here! See All Ammunition Recommendations Here.

This BCA AR-15 complete 300 Blackout pistol length upper has a 10.5" heavy barrel with a parkerized finish, and features a 1:8 twist rate, with a pistol length gas system. It includes a 9.5" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This 300 Blackout upper is compatible with any mil-spec AR-15 lower. More Information SKU 636N-UA300PHB10.518P-10M3 Weight (lbs) 4.000000 Magazine Capacity N/A Length 10.5 Profile Heavy Barrel Twist 1:8 Finish Parkerized Material 4150 Chrome Moly Vanadium Thread Pitch 5/8 x 24

This BCA AR-15 complete 5.56 NATO rifle length upper has a 22" heavy barrel with a 416R Stainless Steel finish with spiral flutes, and features a 1:8 twist rate, with a rifle length gas system. It includes the new 15" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This 5.56 NATO upper is compatible with any mil-spec AR-15 lower.  SKU 8982N-UA556RHB2218SSSF-15M3 Weight (lbs) 6.100000 Magazine Capacity N/A Barrel Length 22 Profile Heavy Barrel Twist 1:8 Barrel Finish Stainless Steel Material 416R Stainless Steel

Bully Arms BA-15 Skeletonized Upper Receiver (Black Anodized) The Bully Arms BA-15 Upper Receiver is here to make a wave in the industry. Machined from 7075-T6 aircraft aluminum here in the USA. With our sights set on delivering Lightweight, Sleek parts without sacrificing strength or quality. Features: Black - Type III hard anodized finish Machined from high grade 7075 Billet Aluminum. AR15 Universal Upper Receiver. M4 Feedramp Sleek Shell Deflector Compatible with Mil-Spec parts Bully Arms 100% Product Guarantee. SKU: BA-15-UR-BLK UPC: 860006522212

8.3" 9mm Upper Receiver - Black | FLASH CAN | 9" Tube Handguard | Without Bolt Carrier Group and Charging Handle This barreled 8.3 inch upper receiver comes with a 9" free float tube handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean. Barrel Specifications Caliber 9mm Length 8.3" Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Dimpled?

Details SKU:B2-K611-CF00UPC:640901516011 Manufacturer:AndersonItem Condition:Factory NewCaliber:300 BlackoutBarrel Length:16 inRate of Twist:1.8 inMaterial:Forged 7075-T6 Aluminum

Building a 9mm AR 15 is a fun, rewarding experience that gives you a versatile weapon for everything from home defense to weekend plinking. If you're starting a build, shopping for AR15 Upper Receivers is one of the first steps. To make it easier, you can't go wrong with the Stern Defense AR 15 6-inch Assembled Upper Receiver w/ 8-inch MLOK Rail. Since it's fully assembled, it comes with everything you need to put the weapon together without hassle, including the dust cover, forward assist, handguard, and a Glock-cut bolt.

This Aero Precision M4E1-T Complete Upper includes the ATLAS R-ONE Handguard. The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

Factory New - comes with a 16" lightweight barrel with M-LOK rails. This AR57 AR57 Upper Receiver Assembly converts any AR-15 lower to a rifle capable of shooting 5.7x28 ammunition. The unique upper design of these AR15 Upper Receivers loads from the top and ejects downward through the AR-15 mag well. The new generation upper has a stronger, lighter, and more streamlined rail; finished with a beautiful ultra-smooth melonite black coating. Convert your AR-15 type rifle to shoot the same 5.7x28 ammo as the legendary FN P-90 PDW!

The Radical Firearms 8.5 inch Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Upper Receiver, Forward Assist, Ejection Port Door, Barrel Nut. 8.5 inch HBAR Profile Barrel and A2 Flash Hider. Bolt Carrier Group and Charging Handle are additional. 8.5 inch HBAR Melonite Barrel. 4150 V Chrome Moly. 1 in 7 inch twist rate. 300 AAC BLACKOUT Chamber. 5/8x24 Thread Pitch. HPT/MPI.

Build your dream rifle with this AR 15 Mil-Spec Upper Receiver that features a mid-length gas system and government profile 14.5in barrel. This Daniel Defense upper is an OpticsPlanet Exclusive, which means you won't find this exact build and color available anywhere else! These custom-built AR15 Upper Receivers are available with a DD extended flash suppressor attachment, and all uppers are crafted from anodized aluminum that is rugged, lightweight, and resistant to corrosion.

This Complete 8.3 inch upper receiver comes with a 10" free float tube handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean. Barrel Specifications Caliber 9mm Length 8.3" Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Dimpled? No Twist Rate 1:10 Muzzle Thread 1/2x36 Weight 13.8oz Bolt Carrier Group:

Builder's Grade 16" 9mm Upper Receiver | A2 | 12" M-LOK Handguard | Pistol Caliber | Black | Without Bolt Carrier Group and Charging Handle This Barreled 16 inch M-LOK upper receiver comes with a 12 inch free-float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 M4 barrel.

The DDM4V7 Upper Receiver Group by Daniel Defense is constructed around a 16-inch, cold hammer forged barrel and comes equipped with the extra features and quality expected from Daniel Defense products. The interior of the barrel is chrome lined for a superior service life, and is topped with a Daniel Defense improved flash suppressor to greatly mitigate visible muzzle flash. The gas system is composed of a mid-length, direct impingement system with a pinned low profile gas block CNC machined from 4140 hardened steel.

Want to see ALL of our Gun.Deals Exclusive Prices? CLICK HERE TO CHECK OUT ALL THESE DEALS The Matador Arms Montgo-9 Complete 9mm Upper fits most AR-15/AR-9 Lowers. This upper features a 5.5-inch barrel crafted from 4140 steel with a black nitride finish. The billet aluminum upper receiver is hardcoat anodized to maximize its strength and durability.

CUS16M4 Details: AR15 CUSTOM UPPER 16" 556 PENCIL BFI M4 HANDGUARD Specifications & Features: • Barrel: Bushmaster 5.56NATO 16" M4 pencil barrel with A2 Flash hider. • Chamber: 5.56NATO • Twist Rate: 1:8" • Gas System: Carbine-Length Direct Impingement with Flat Top Gas Block and Bayonet Lug • Handguard: M4 Handguard • Muzzle Device: A2 Flash Hider • Overall Length: 23.5" BOLT CARRIER GROUP OR CHARGING HANDLE IS NOT INCLUDED This item cannot be shipped to California, Connecticut, Maryland, New Jersey, New York, or Washington D.C. 783583554015

AR15 CUSTOM UPPER 16" 556 PENCIL BFI QUADRAIL Specifications & Features: • Barrel: Bushmaster 5.56NATO 16" M4 pencil barrel with A2 Flash hider. • Chamber: 5.56NATO • Twist Rate: 1:8" • Gas System: Carbine-Length Direct Impingement with Flat Top Gas Block and Bayonet Lug • Handguard: Carbine Length Aluminum Quad Rail • Muzzle Device: A2 Flash Hider • Overall Length: 23.5" BOLT CARRIER GROUP OR CHARGING HANDLE IS NOT INCLUDED This item cannot be shipped to California, Connecticut, Maryland, New Jersey, New York, or Washington D.C.

Aero Precision complete mil-spec AR-15 upper receiver. Fully assembled, includes M4 feed ramps, installed dust cover, forward assist, and laser engraved T- marks on the top rail. Ready to add a barrel and handguard out of the box, this US made upper receiver requires no additional assembly and is competitively priced. Features: - M4 feedramp already installed - Standard .250 takedown pin holes - Laser engraved T-marks - Dust cover and forward assist already installed Includes: - Fully assembled anodized black AR-15 upper receiver About Aero Precision

This Complete 7.5 inch M-LOK upper receiver comes with a 7 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean. Barrel Specifications Caliber 5.56 Length 7.5 Material 4150 Chrome Moly Vanadium Profile Medium Finish QPQ Corrosion Resistant Gas System Length Pistol Gas Block Journal .750" Dimpled? No Twist Rate 1:7 Muzzle Thread 1/2x28 TPI Weight 16.8oz

Builder's Grade Complete 9" .22LR LUpper Receiver | A2 | 7" M-LOK | With Bolt Carrier Group and Charging Handle This Complete 9 inch M-LOK upper receiver comes with a 7 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and the bolt is made of all stainless steel construction and we use an anti-jamb dedicated 22 charging handle. Barrel Specifications Caliber 22LR Length 9" Material 4150 Chrome Moly Vanadium Profile Medium Taper Finish SBN Dimpled?

AR-9 9MM 4.5" UNASSEMBLED COMPLETE PISTOL UPPER KIT / MLOKAR-9 9MM 4.5" UNASSEMBLED PISTOL UPPER / BCG AND CHARGING HANDLE / MLOK Barrel Length: 4.5" Barrel Profile: Straight Barrel Steel: 4150 Chrome Moly Vanadium  Barrel Finish: Nitride  Muzzle Thread: 1/2-36 Chamber: 9mm (9x19) Twist Rate: 1 in 10" Barrel Extension: 9mm, blowback Muzzle Device: A2 Flash Hider Receiver Material: ForgedReceiver Type: Flat Top AR-15, forward assist and dust cover included, black hardcoat anodized Hand guard Type: 4" Mlok Bolt Included: Yes (Hybrid AR-9) Bolt Steel: 8620 Charging Handle: Included, standard AR-1

SKU 51655128537 Brand Palmetto State Armory Model Number 51655128537 UPC 51655128537 DETAILS Barrel Length: 16" Gas System: Mid-length Barrel Profile: A2 Barrel Steel: Chrome-Moly Vanadium Barrel Finish: Nitride Chrome Lining: None Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: F-marked Front Sight Base Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: M4 Hand guard Type: B5 Systems Polymer FDE Hand Guard Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158

SKU 51655111444 Brand Palmetto State Armory Model Number 51655111444 UPC 51655111444 DETAILS Barrel Length: 11.5" Barrel Profile: A2 Barrel Steel: Chrome Moly Vanadium Barrel Finish: Nitride Chrome Lining: No Muzzle Thread: 1/2-28 Chamber: 5.56 NATO  Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low-profile Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: A3 Handguard Type: Lightweight M-Lok 10.5" Free Float Rail Bolt Carrier Group Included: No Bolt Steel: N/A Bolt Carrier Profile: N/A

350 Legend offers great performance for hunting medium game with the AR15 platform. Being a straight walled cartridge, 350 legend allows for legal hunting in some states or jurisdictions with regulations that prohibit the use of bottleneck cartridges that are commonly used for hunting in the AR15/AR10 platforms. NOTE: Ensure you comply with all rules and regulations for your specific hunting area.

This Complete Upper includes the Slimline Handguard! INCLUDES: M4E1 THREADED ASSEMBLED UPPER RECEIVER Slimline Handguard 16" 5.56 CMV Gov. Barrel Low Profile Gas Block and Mid Length Gas Tube Product comes assembled This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab M4E1 UPPER WITH NO FORWARD ASSIST FEATURES: No Forward Assist Custom enhanced forging that gives the upper receiver a "billet look" while maintaining the structural integrity of a forged part

This complete upper includes our Slimline Handguard. The slimline line of handguards have a unqiue milling profile, designed to maximize grip ergonimics and minimize weight while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

This complete upper receiver features the same tried-and-true construction and aesthetics as our M4E1 Threaded Upper Receivers, without provisions for a forward assist. INCLUDES: M4E1 Enhanced Assembled Upper Receiver 16" 5.56 Mid-Length Gov Barrel Low Profile Gas Block and Mid Length Gas Tube Product comes assembled This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab M4E1 UPPER FEATURES: Forged from 7075 T6 aluminum Precision machined to M4E1 specs M4 feedramps

Mid State Firearms Ar15 Upper Receiver with lightweight Keymod V15 slim freefloat rail. 16" 416r Stainless m4 Barrel .223 Wylde chamber (shoots both 5.56 and .223) 1:8 Twist 7075-t6 Aluminum mil-spec receiver Dust cover, forward assist 15" slim keymod free float rail a2 flash hider Carbine gas .750 steel gas block Item #: 16upperssv15

This Complete 11 inch M-LOK upper receiver comes with a 9 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean. Barrel Specifications Caliber 9mm Length 11 Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Dimpled? No Twist Rate 1:10 Muzzle Thread 1/2x36 TPI Weight 17.6oz Bolt Carrier Group:

SKU 5165448513 Brand Palmetto State Armory Model Number 5165448513 UPC 5165448513 DETAILS PSA 16" MID-LENGTH 5.56 NATO 1:7 NITRIDE 13.5" LIGHTWEIGHT M-LOK UPPER - WITHOUT BCG OR CH - Barrel Length: 16" - Gas System: Mid - Barrel Profile: A2 - Barrel Steel: 4150 Chrome-Moly Vanadium - Barrel Finish: Nitride - Chrome Lining: None - Muzzle Thread: 1/2-28 - Chamber: 5.56 NATO - Twist Rate: 1:7 - Barrel Extension: M4 - Diameter at Gas Block: .750 - Gas Block Type: Low-profile - Muzzle Device: A2 Flash Hider - Receiver Material: Forged 7075 T6 - Receiver Type: M4

Weight 0.0000 oz Finish Anodized, Black Forward Assist Included Uninstalled Port Door / Dust Cover Included Uninstalled Receiver Material 7075 Aluminum T-Marks Unmarked Feed Ramps None MPN D076 UPC 810084374160 SKU: D076

This precision Ar15 upper comes assembled and ready to drop on your mil spec lower. 18" 416r Stainless Fluted barrel - HBAR Profile .223 Wylde chamber (shoots both 5.56/.223) 1 in 8 twist. m4 feedramps Mid-Length gas system, .750 gas block 7075-T6 Mil-Spec Aluminum Receiver Dust cover, Forward Assist 12" Free Float Hybrid Slim Keymod Rail M16 Bcg and Charging Handle Available, select from menu Item #: 18spiralhybrid

Want to see ALL of our Gun.Deals Exclusive Prices? CLICK HERE TO CHECK OUT ALL THESE DEALS PURCHASE A2 Rear Sight HERE Retro builds have been growing in popularity over the last few years.

This BCA AR-15 complete 5.56 Nato rifle length upper has a 16" M4 contour barrel with a black nitride finish, and features a 1:7 twist rate, with a mid-length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. This has the new handguard. More Information SKU 611N-UASCH556MM41617M-15M3 Weight (lbs) 5.300000 Magazine Capacity N/A Length 16 Profile M4 Contour Twist 1:7 Finish Black Nitride

SKU 5655103899 Brand Palmetto State Armory Model Number 5655103899 UPC 5655103899 DETAILS Barrel Length: 16" Gas System: Midlength Barrel Profile: A2 Barrel Steel: 4150 Chrome-Moly Vanadium Barrel Finish: Nitride Chrome Lining: None Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low-profile Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: M4 Handguard Type: Timber Creek Enforcer 15" M-Lok Free Float Rail Bolt Carrier Group Included: No Bolt Steel: N/A

300 Blackout Ar-15 Pistol length ‘Grab Bag’ upper. Sometimes we receive some cosmetically blemished parts, or a customer might back out on an order, or we may have leftover gun-show inventory. This is an assembled upper (option to add BCG / Charging Handle) that will come with a free float handguard style of your choice! Picatinny Quad Rail or Slim M-Lok! Lengths and rail type may vary. The receiver itself might be forged or billet, and may or may not have dust cover / forward assist features.

This BCA AR-15 complete DUAL Charger 5.56 Nato pistol length upper has a 10.5" M4 barrel with a parkerized finish, and features a 1:8 twist rate, with a carbine length gas system. It includes a 9.5" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected) and rear charge handle. This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. More Information SKU 9727N-UADCH556CM410.518P-10M3 Weight (lbs) 3.500000 Magazine Capacity N/A Length 10.5 Profile M4 Contour Twist 1:8

AR-15 5.56/.223 16" Gov't Profile BLACK SHARK Upper Assembly / MLOKAR-15 5.56/.223  16" M4 "BLACK SHARK" UPPER ASSEMBLY. We now offer this upper with 12" slim profile Mlok rail.

This BCA AR-15 complete 300 Blackout pistol length upper has a 8.5" heavy contour barrel with a parkerized finish, and features a 1:8 twist rate, with a pistol length gas system. It includes the new 6.5" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 300 Blackout upper is compatible with any mil-spec AR-15 lower. SKU 271N-UASCH300PHB8.518P-7M3 Weight (lbs) 3.800000 Magazine Capacity N/A Length 8.5 Profile Heavy Barrel Twist 1:8 Finish Parkerized

This Bear Creek Arsenal AR-15 Complete 5.56 rifle length upper has a 16" M4 with a black nitride finish, and features a 1:7 twist, with a mid-length gas system. It includes a 15" MLOK rail, a M4 flat-top forged upper receiver, a BCA bolt carrier group, flash hider, and a rear charging handle. This 5.56 upper is compatible with any mil-spec AR-15 lower. More Information SKU 608N-UA556MM41617M-15M3 Weight (lbs) 5.300000 Magazine Capacity N/A Length 16 Profile M4 Contour Twist 1:7 Finish Black Nitride Material 4150 Chrome Moly Vanadium Thread Pitch 1/2 x 28 Caliber 5.56 NATO

This BCA AR-15 complete 7.62x39 pistol length upper has a 7.5" heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a pistol length gas system. It includes a 6.5" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 7.62x39 upper is compatible with any mil-spec AR-15 lower. More Information SKU 547N-UASCH762PHB7.5110P-7M3 Weight (lbs) 4.100000 Magazine Capacity N/A Length 7.5 Profile Heavy Barrel Twist 1:10 Finish Parkerized Material 4150 Chrome Moly Vanadium

SKU 51655155040 Brand Palmetto State Armory DETAILS Barrel Length: 16" Gas System: Carbine Barrel Profile: M4 Barrel Steel: 4150 Chrome-Moly Vanadium Barrel Finish: Nitride Chrome Lining: None Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low-profile Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: M4 Handguard Type: PSA 13.5" Hex Full Picatinny M-Lok Rail Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto

100-041-773WB Enhanced FM9 4in Upper Cartridge: 9 mm Luger Finish: Black Style: Complete Contour: Medium Length: 4" Twist: 1-10 Description Specs Enhanced 9mm Pistol Upper Receivers with Set of MLOK Covers!

SKU 5165451263 Brand Palmetto State Armory Model Number 5165451263 UPC 5165451263 DETAILS Barrel Length: 8.5" Barrel Profile: Heavy Gas System: Pistol-length Barrel Steel: 4150V Chrome Moly Vanadium Barrel Finish: Nitride Chrome Lining: No Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low-profile Muzzle Device: PSA Fluted Flash Can Receiver Material: Forged 7075 T6 Receiver Type: M4 Handguard Type: PSA 10.5" Lightweight M-Lok Free Float Rail Bolt Carrier Group Included: Yes

SKU: LWD-ARUPPER-556-16-CO UPC: 840235901723 Mil-Spec charging handle and bolt carrier group included Introducing the Contract Overrun complete upper receiver from Lone Wolf Arms, your ultimate gateway to crafting a top-tier AR15 rifle. Designed with precision and reliability in mind, this upper receiver boasts an 16-inch barrel with a 1/8 twist rate, chambered in the versatile .223 Wylde caliber. Crafted from resilient 41V50 steel, this barrel ensures durability and accuracy, even under the most demanding conditions.

SKU: LWD-ARUPPER-556-11-CO UPC: 840235901716 Mil-Spec charging handle and bolt carrier group included Introducing the Contract Overrun complete upper receiver from Lone Wolf Arms, your ultimate gateway to crafting a top-tier AR15 rifle. Designed with precision and reliability in mind, this upper receiver boasts an 11.5-inch barrel with a 1/8 twist rate, chambered in the versatile .223 Wylde caliber. Crafted from resilient 41V50 steel, this barrel ensures durability and accuracy, even under the most demanding conditions.

BCM® M4 Flat Top Upper Receiver with cosmetic blemishes. Most have scratches or scuffs. The upper comes unassembled, but complete with BCM forward assist assembly and ejection port cover door assembly. You must assemble it. (Assembly required) (all parts, but you will have to assemble together) THESE ARE USED/DEMO UPPER RECEIVER ASSEMBLIES. All will have several nicks, scratches, and marks on exterior finish. NO HANDPICKING. This receiver has the M4 feedramps machined in. This is to be used with barrels that include the M4 barrel extension. Built to the correct Mil-Specs.

SKU 5165500368 Brand Palmetto State Armory Model Number 5165500368 UPC 5165500368 DETAILS Barrel Length: 20" Gas System: Rifle-length Barrel Profile: A2 Style Barrel Steel: 416R Stainless Steel Barrel Finish: Stainless Chrome Lining: None Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low profile Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: M4 Handguard Type: PSA 15" M-Lok Lightweight Rail Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158

This Aero Precision M4E1 Threaded AR-15 upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS R-ONE M-LOK handguard. This barreled upper receiver group does not include BCG or charging handle allowing you to choose your favorites for your build. The upper receiver is, however, fully assembled with forward assist and dust cover. The M4E1 threaded upper is made from forged 7075-T6 aluminum with a billet machined look that matches the lower and handguard.

This BCA AR-15 complete 5.56 Nato rifle length upper has a 16" M4 contour barrel with a black nitride finish, and features a 1:7 twist rate, with a mid-length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. This has the new handguard. More Information SKU 611N-UASCH556MM41617M-15M3 Weight (lbs) 6.000000 Magazine Capacity N/A Length 16 Profile M4 Contour Twist 1:7 Finish Black Nitride

Aero Precision APAR700304M68: This complete upper includes Aero Precision's ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.