Firearm Kits Gun Parts
(280 deals total)

  • Firearm Kits
from $379.99
UPC: 000516444601
MPN: 516444601
Caliber: 223/5.56
Type: Rifle Kit
Overall Length: 24.5"
from $319.99
UPC: 745557100741
MPN: RK9MM16LPK
Caliber: 9mm
Type: Build Kit
Overall Length: 17.8000
from $299.99
UPC: 745557101038
MPN: PK556-LPK
Overall Length: 14.2500
from $314.94
UPC: 819925022666
Caliber: 9mm
Type: Pistol: Semi-Auto
from $499.99
UPC: 005165447638
MPN: 5165447638
Caliber: 223/5.56
Type: PSA Custom Firearm
Overall Length: 24.5"

Filter Firearm Kits Gun Parts

14 months ago
Description PICTURE DOES NOT MATCH UPPER.. THIS KIT IS NOT SIDE CHARGE!!! Disclosure: Handguards will be either keymod or mlok depending on availability. If you have a preference, please leave in the comment at checkout and we will try to accommodate the request. AR-10 Upper Receiver AR-10 Dust Cover AR-10 Forward Assist 15″ .308 Handguard .308 Lower Parts Kit .308 BCG .308 Standard Charging Handle .308 Birdcage Flash Hider Rifle Length Gas System 24″ 6.5 Creedmoor Barrel .308 LE Stock Kit KIT notice as of March 1st 2020.
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14 months ago
Description 24″ 5.56/.223 Premium AR-15 Build Kit Description: - Anderson Forged Upper Receiver - AR-15 Dust Cover - AR-15 Forward Assist - 18″ Handguard - Gas Block - Rifle Gas Tube - Standard Charging Handle - AR-15 Lower Parts Kit - LE Stock Kit - 5.56 Bolt Carrier Group - 24″ 5.56 Barrel - Single Point Adjustable Bungee Sling with Metal QD Snap Hook Adapter – Black - Brass Catcher - Durkin Tactical AR15 Build Mat – Durkin Green - Flat dual endplate Shooting steel case ammunition through our products voids ALL warranties!!! Legal Restriction:
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14 months ago
Description Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 24″ AR-15. This kit includes: - 24″ 5.56/.223 Barrel (stainless steel or black nitride, twist may vary) - 15″ FDE Handguard (depending on availability) - A2 Birdcage Muzzle Brake - 6 Position Tan Buffer Kit (color may not match the upper color) - Nitride Full-Auto BCG - Either Stripped or Upgraded Billet Upper Receiver (depending on availability) FDE Cerakote
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14 months ago
UPC#: 640901515953 Details: These lower parts kits are all high quality, mil-spec parts. Complete LPK Includes: Pistol Grip, Trigger, Trigger Guard, Hammer, Disconnector, Selector, Bolt Catch Spring, Detent Spring, Bolt Catch Buffer, Take Down Detent, Bolt Catch, Magazine Catch Spring, Bolt Catch Roll Pin, Magazine Catch Button, Magazine Catch, Front Pivot Pin, Hammer Spring, Trigger Spring, Pistol Grip Screw, Pistol Grip Lock Washer, Selector Spring, Detent Selector, Hammer Pin, Trigger Pin, Take Down Pin, Buffer Retainer Pin, Buffer Retainer Spring, Disconnector Spring
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14 months ago , by Dealer
Key Features Forged Upper Receiver Mil-Spec stripped upper receiver ready for custom builds 16" .300 Blackout Barrel Reliable performance with barrel twist varying by configuration 15" Free-Float Handguard Black M-LOK handguard for accessories and enhanced stability USA-Made BCG Bolt carrier group manufactured in the USA
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14 months ago
Description 16″ .300 Blackout Holiday Build Kit Includes - AR 15 Billet or Forged Upper Receiver - AR-15 Black Dust Cover - Black Nitride .223/5.56/.300/.350 Bolt Carrier Group - AR-15 Black Charging Handle - AR-15 Lower Parts Kit - .750 Gas Block - Pistol Gas Tube - LE Mil-Spec Stock Kit - 10″- 12″ Keymod Handguard - 5/8×24 A2 Birdcage Flash Hider - 16″ .300 Blackout Barrel MPN#: KIT-15-300-16-003
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14 months ago
Description 7.5″ 5.56/.223 Black Friday AR-15 Pistol Build KitDescription: 7.5″ 5.56/.223 Barrel Nov 28th 11am updated to black barrel 10″-12″ Handguard keymod/mlok or quadrail (Depending on availability) AR-15 Upper Receiver Dust Cover Forward Assist .750 Gas Block Pistol Gas Tube AR-15 Lower Parts Kit AR-15 Pistol Tube Kit .223/5.56/.300/.350 BCG Standard AR-15 Charging Handle 1/2×28 Thread Protector Shooting steel case ammunition through our products voids ALL warranties!!! Legal Restriction:
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14 months ago
Description Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 7.5″ AR-15. This kit includes: - 7.5″ 5.56 Nato Barrel (twist may vary) - 7″ Handguard (depending on availability) - Flash Hider - Pistol Buffer Kit - Flag Laser Engraved BCG - Either Stripped or Upgraded Billet Upper Receiver (depending on availability) - Forward Assist (where applicable) - Dust Cover - Steel Gas Block - Stainless Gas Tube - Standard Charging Handle
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14 months ago
Disclosure: Handguards will be either quad rail, keymod, or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 16″ AR-15. This kit includes: - 16″ 5.56/.223 Barrel (twist may vary) - 10″-12″ Free-Float Quad Rail Handguard (depending on availability) - A2 Muzzle Brake - Complete Omega Stock Kit - Durkin Precision BCG - Either Stripped or Upgraded Billet Upper Receiver (depending on availability) - Forward Assist (where applicable) - Dust Cover - Steel Gas Block - Stainless Gas Tube
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14 months ago , by Dealer
AR-15 6.5 Grendel 18" Rifle Build Kit (Unassembled) - Black Key Features Forged Upper Receiver: Mil-Spec stripped upper receiver for strength and reliability. 18" 6.5 Grendel Barrel: Optimized for long-range accuracy and ballistic performance. 17" M-LOK Handguard: Free-float design provides stability and ample accessory mounting space. USA-Made BCG: Bolt carrier group manufactured in the USA.
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14 months ago , by Dealer
AR-15 5.56 NATO 16" Rifle Build Kit (Unassembled) - Black Key Features Forged Upper Receiver: Mil-Spec stripped upper receiver for strength and reliability. 16" 5.56 NATO Barrel: Versatile barrel length ideal for range, duty, and recreational shooting. 15" M-LOK Handguard: Free-float design for enhanced accuracy and accessory mounting flexibility. USA-Made BCG: Bolt carrier group manufactured in the USA.
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14 months ago , by Dealer
AR-15 .223 Wylde 16" Rifle Build Kit (Unassembled) - Black Key Features Forged Upper Receiver: Mil-Spec stripped upper receiver for strength and reliability. 16" .223 Wylde Barrel: Designed to safely and accurately fire both .223 Remington and 5.56 NATO ammunition. 15" M-LOK Handguard: Free-float design provides enhanced accuracy and ample accessory mounting space. USA-Made BCG: Bolt carrier group manufactured in the USA.
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14 months ago , by Dealer
AR-15 300 Blackout 10.5" Pistol Build Kit (Unassembled) - Black Key Features Forged Upper Receiver: Mil-Spec stripped upper receiver for strength and reliability. 10.5" 300 Blackout Barrel: Optimized for compact builds and excellent suppressed performance. 10" M-LOK Handguard: Free-float design for improved accuracy and versatile accessory mounting. USA-Made BCG: Bolt carrier group manufactured in the USA.
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15 months ago , by Dealer
Overview This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable .223 Wylde build. It includes a stripped upper receiver, a 20" .223 Wylde barrel with a gas system (twist varies depending on the barrel), and a black 17" free-float M-LOK handguard for stability and accessory mounting. The kit also features a Bolt Carrier Group made in the USA, a standard charging handle, a complete lower parts kit, and a Mil-Spec buffer tube assembly. Only a stripped lower receiver and magazine are required to complete the build.
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15 months ago , by Dealer
Overview This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable 7.62×39 build. It includes a stripped upper receiver, a 7.5" 7.62×39 barrel with a gas system (twist varies depending on the barrel), and an Orange 7" free-float M-LOK handguard for stability and accessory mounting. The kit also features a Bolt Carrier Group made in the USA, a standard charging handle, a complete lower parts kit, and a Pistol buffer tube assembly. Only a stripped lower receiver and magazine are required to complete the build.
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15 months ago , by Dealer
- OVERVIEW - This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable 300 Blackout build. It includes a Stripped Upper Receiver, a 10.5" 300 Blackout barrel with a gas system (twist varies depending on the barrel), and a Blue 10" free-float M-LOK handguard for stability and accessory mounting.
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15 months ago
The Rise Armament AR-15 Build Kit Bundle provides all your favorite Rise Armament parts in one convenient package. This comprehensive bundle is perfect for your next rifle or carbine build! The Rise Armament Rave 140 Trigger is the heart of the package. It offers extreme reliability through enhanced engineering. Rise's RA-140 Super Sporting Trigger (SST) was rated in the top 10 of all trigger groups by independent testers when it was released. It was praised for performance, reliability and value. Now it is even better as the Rave 140!
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MidwayUSA 484
15 months ago , by Dealer
Overview The Shooters Gate AR-10 Assembled Rifle Build Kit provides a complete foundation for building a dependable .308 Winchester rifle. Featuring a fully assembled upper receiver, premium components, and Mil-Spec hardware, this kit delivers reliability and performance for hunting, range shooting, and precision applications.
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15 months ago , by Dealer
Model: AR-10 Assembled Rifle Build Kit ⚠ WARNING: This product can expose you to chemicals such as lead and other petroleum products which are known to the State of California to cause cancer and birth defects or other reproductive harm.
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16 months ago
DB10 .308 16″, Mid Length, Upper Assembly, with 15″ CCML Rail, Black W/ BCG & CH Diamondback Barrels DB10 .308 Winchester, Mid-Length, 16″, Light, 4150, Black Nitride, 1:10 DB10 Ejection Port Door Assembly (Cover, Pin & Spring) DB10 Mid-Length Gas System DB10 Low Profile Gas Block DB10 Upper, Black Anodized DB10CCML 15″ Free Float M-Lok Handguard Assy W/ Jam Nut 1 – 16 TPI Barrel Nut 1 – 18 TPI Barrel Nut DB10 Forward Assist Assembly, Includes Pawl, Button, Pawl Roll Pin, Pawl Spring & Pawl Detent DB10 Crush Washer DB10 Flash Hider
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16 months ago , by Dealer
Model: AR-15 Unassembled Pistol Build Kit Shooters Gate is proud to offer the AR-15 Unassembled Pistol Build Kit. This kit includes nearly everything needed to build your own AR-15 Pistol. Simply add a stripped lower receiver and magazine to complete your firearm.
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16 months ago , by Dealer
Model: AR-15 Unassembled Pistol Build Kit Shooters Gate is proud to offer the AR-15 Unassembled Pistol Build Kit. This kit includes nearly everything needed to build your own AR-15 Pistol. Simply add a stripped lower receiver and magazine to complete your firearm.
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16 months ago , by Dealer
16 months ago , by Dealer
Overview This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable 5.56 NATO build. It includes a stripped upper receiver, a 14.5" 5.56 NATO barrel with a gas system (twist varies depending on the barrel), and a Black 12" free-float M-LOK handguard for stability and accessory mounting. The kit also features a Bolt Carrier Group made in the USA, a standard charging handle, a complete lower parts kit, and a Pistol buffer tube assembly. Only a stripped lower receiver and magazine are required to complete the build.
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16 months ago , by Dealer
OVERVIEW This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable .223 Wylde build. It includes a stripped upper receiver, a 10.5" .223 Wylde barrel with a gas system (twist varies depending on the barrel), and a black 10" free-float M-LOK handguard for stability and accessory mounting.
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16 months ago
AR-STONER AR-15 Enhanced Build Kit with Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Mid Length 15" M-LOK Handguard, Complete Lower Parts Kit with Magpul MOE Furniture and Sight Set Black - The AR-STONER AR-15 Enhanced Build Kit contains everything needed to complete an AR-15 build, except the stripped lower. These enhanced kits Also included upgraded Magpul furniture. The AR-STONER complete lower parts kits offers the rugged reliability of AR-Stoner, with the upgraded performance you expect from Magpul where it really matters.
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MidwayUSA 129
16 months ago
AR-STONER AR-15 Enhanced Build Kit with Upper Receiver Assembly 5.56x45mm NATO 18" Barrel12" M-LOK Handguard, Complete Lower Parts Kit with Magpul MOE Furniture Black - The AR-STONER AR-15 Enhanced Build Kit contains everything needed to complete an AR-15 build, except the stripped lower. These enhanced kits Also included upgraded Magpul furniture. The AR-STONER complete lower parts kits offers the rugged reliability of AR-Stoner, with the upgraded performance you expect from Magpul where it really matters.
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18 months ago
The Andro Corp Industries .45 ACP Billet Receiver Set Gen 1 is a versatile and customizable option that accommodates Glock pattern magazines. It features billet 6061 aluminum alloy construction for strength and is precision machined for a precise fit. The set features beveled magazine feed ramps that ensure seamless and dependable feeding. Additionally, the set includes a tensioning screw, rear takedown pin screw, bolt catch screw, ejector and screws, mag release paddle, spring, and screw.
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19 months ago , by Dealer
Want to see ALL of our Gun.Deals Exclusive Prices? CLICK HERE TO CHECK OUT ALL THESE DEALS NO FURTHER DISCOUNTS CAN BE APPLIED TOWARDS THIS ITEM SPECIFICATIONS: Caliber: 5.56 NATO Classification: Pistol Barrel: Bear Creek Arsenal 7.5" AR-15 Pistol Barrel 5.56 NATO Stainless Steel 1-7 Twist Twist Rate: 1:7T Thread Pitch: 1/2x28 Upper Receiver: Davidson Defense Mil-Spec AR-15 Upper w/ M4 Feedramps - 7075 T6 Aluminum Handguard: Davidson Defense AR-15 7" Quad Rail Handguard
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20 months ago , by Dealer
AR-15/47/9/300 Custom Lightweight Side Cut Billet Upper Receiver - Black
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21 months ago , by Dealer
AR-15 COMPLETE SIDE CHARGING UPPERRECEIVER ASSEMBLY | URSBCG-AR
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21 months ago , by Dealer
7" 5.56 NATO 1:7 Twist Parkerized Pistol Barrel | Made in U.S.A
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21 months ago , by Dealer
5'' 5.56 NATO 1:5 5R Twist Nitride Pistol Barrel and Micro Gas Tube | Made in U.S.A
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22 months ago , by Dealer
5'' 5.56 NATO 1:5 5R Twist Nitride Pistol Barrel and Micro Gas Tube | Made in U.S.A
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23 months ago , by Dealer
7" 5.56 NATO 1:7 Twist Parkerized Pistol Barrel | Made in U.S.A
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23 months ago , by Dealer
We have tons of AR-15 KITS on sale and here are some of the highlights that we have below. The price listed is after the code has been applied at checkout: NBS 16″ 5.56 NATO Midlength Nitride M-LOK Rifle Kit - $399.96 NBS 7.5" 5.56 Slick-Side Nitride M-LOK Pistol Kit - $359.96
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23 months ago , by Dealer
5'' 5.56 NATO 1:5 5R Twist Nitride Pistol Barrel and Micro Gas Tube | Made in U.S.A
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23 months ago , by Dealer
24 months ago
Davidson Defense "Wide ARC" AR-15 Rifle Featuring Davidson Defense Upper 6MM ARC 18" 4150 CMV Nitride 1:7.5T 17" Keymod Gauntlet Arms Free Float Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 6mm ARC / 6x38mm
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24 months ago , by Dealer
AR-15 .223/5.56 5" BARREL W/ 4'' HANDGUARD | ''WHI CAM-FML4C'' PISTOL KIT AR-15 .223/5.56 5" BARREL W/ 4'' HANDGUARD | ''ORG CAM-FML4C'' PISTOL KIT
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24 months ago
Davidson Defense "Saturn's Wild Thing" AR-15 Rifle Featuring Davidson Defense Upper .223 Wylde 16" 416R SS Nitride 1:8T 15" M-Lok Davidson Defense Free Float Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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24 months ago
DD Custom Arms "Nebulous" LR-308 Rifle Featuring Davidson Defense Upper .308 WIN 20" 416R SS Stainless 1:10T 15" M-Lok Guntec Freefloat Handguard Full Build Kit (Assembled or Unassembled) Caliber: - Caliber: .308 Winchester / 7.62x51 NATO If you love the AR platform but are looking to use a round that reaches further and has more power, this LR-308 Upper Build Kit is a great option at a great price. Our .308 Winchester LR-308 Rifle Upper Build Kits take the hassle out of building your custom firearm. Barrel: - Barrel:
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24 months ago
5" 5.56 NATO 1:5 5R Twist Pistol barrel and Micro Gas Tube| Made in USA
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25 months ago
SKU 51655105200 Brand Palmetto State Armory Model Number 51655105200 UPC 51655105200 DETAILS Barrel Length: 10.5" Barrel Profile: A2 Gas System: Carbine-length Barrel Steel: 4150V Chrome Moly Vanadium Barrel Finish: Phosphate 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 Aluminum Receiver Type: M4 Handguard Type: PSA 12" Slant End M-Lok Rail Bolt Carrier Group Included: Yes
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25 months ago
Davidson Defense "Streamline in 762x39" AR-15 Rifle Featuring Davidson Defense Upper 7.62x39mm 16" 4150 CMV Nitride 1:10T 15" M-LOK Davidson Defense Free Float Handguard Complete Upper Build (Assembled or Parts Kit) Caliber: 7.62x39
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25 months ago
Davidson Defense "Chamois V223" AR-15 Rifle Featuring Davidson Defense Upper .223 Wylde 16" 4150 CMV Phosphate 1:8T 15 M-Lok Guantlet Arms Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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25 months ago
Davidson Defense "The Ghoul" AR-15 Rifle Featuring Davidson Defense Upper 5.56 NATO 16" < > QPQ Nitride 1:7T 15 M-Lok Trinity Force Freefloat Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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25 months ago
Davidson Defense "Megaton" AR-15 Rifle Featuring Davidson Defense Upper 5.56 NATO 16" < > QPQ Nitride 1:7T 15" M-LOK Davidson Defense Free-Float Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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25 months ago
Davidson Defense "Minerva" AR-15 Rifle Featuring Davidson Defense Upper .223 Wylde 17.1" < > Nitride 1:8T 16.5 M-Lok Gauntlet Arms Freefloat Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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25 months ago
SKU 51655155736 Brand Palmetto State Armory DETAILS Barrel Length: 18" Gas System: Rifle Length Barrel Profile: A2 Barrel Steel: 416R Stainless Steel 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 15" Lightweight Hex Full Picatinny M-Lok Rail Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto
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25 months ago
Item Number: 148583 MPN#: PK9MM-LPK-7 TCF-PK9MM-LPK-7 The Tacfire Build Kit contains one of each- 9MM 7.5" Barrel USA Made, 9MM Bolt Carrier Group, Mil-Spec Upper Receiver USA Made, Slim Free Float MLOK Hand Guard 7", Complete Lower Parts Kit USA Made, Standard Receiver End Plate, Mil-Spec/ Commercial Castle Nut/Steel, Mil-Spec Pistol Buffer Tube/Alum. w/Foam Cover, Heavy Buffer, Buffer Tube Spring, Mil-Spec Charging Handle, Dust Cover, Forward Assist, 1/2"x36 Thread Flash Forwarder, and A2 black pistol grip For Use With: AR 9mm Luger Pistol Includes:
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KyGunCo 210
25 months ago
DD Custom Arms "Seeds of Freedom" 9mm Glock 17 Gen 1-3 Full Pistol Build Kit (Everything Minus Frame) ELD Performance 9mm < > Threaded Black Nitride Barrel Polymer Rear Sight for Glock slides black with white U-notch Glock (Assembled or Parts Kit) Caliber: 9mm Luger / Parabellum
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26 months ago
Davidson Defense "Lightshow 9mm-Black w/ SBA3" AR-15 Pistol Featuring Davidson Defense Upper 9MM 4" 4150 CMV Nitride 1:10T 4 M-Lok Guntec Freefloat Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 9mm / 9x19
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26 months ago
DD Custom Arms "Thrill Seeker" AR-15 Rifle Featuring Aero Precision Upper 5.56 NATO 16" < > QPQ Nitride 1:7T 15 M-Lok Trinity Force Freefloat Handguard Full Build Kit (Assembled or Parts Kit) Caliber: 5.56x45 NATO / .223 Remington
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