Bolt Carriers Gun Parts

(713 deals total)

These BCG's are fully assembled and ready to drop in any AR15 or M16 rifle or pistol. These are the heavier M16 carrier and will work with any AR15 platform rifle. Bolt Subassembly: Bolt: AISI 9310 alloy steel MPI Inspected Extractor: Shot Peened Hardened D2 tool steel O-Ring: Mil-Spec Gas rings (3): Mil-Spec Finish: Black Nitride Bolt Carrier: 8620 steel Heavy Duty M16 design Grade 8 Gas Key Screws, Staked Gas Key Material: 4140 Finish: Black Nitride Cam Pin: 8620 steel Finish: Chrome Firing Pin:

SKU KIT-0420 Model Number KIT-0420 UPC KIT-0420 DETAILS PSA 5.56 Premium Full Auto Bolt Carrier Group w/ Logo SKU: 8779 QTY: 1 PSA AR-15/M16 7075 T6 Forged MIL-SPEC Charging Handle SKU: 24080 QTY: 1 Magpul PMAG 30rd 5.56x45 Gen2 MOE Magazine SKU: 2 QTY: 10 FEATURES PSA 5.56 Premium Full Auto Bolt Carrier Group w/ Logo

Expect nothing less than professional grade weaponry from Bravo Company USA, one of the nation’s largest stocking inventories of AR-15, M4, and M16 parts and accessories. The BCM Bolt Assembly is machined from carpenter No. 158 steel, shot peened for increased strength, and is high pressure tested and magnetic particle inspected. Includes tool steel machined extractor, ejector, and BCM extractor spring. Features: - MIL-SPEC carpenter no. 158 steel (bolt) - High pressure tested and magnetic particle inspected - Shot peened bolt - Tool steel extractor - BCM extractor spring

Details Manufacturer: Palmetto State Armory Caliber: 5.56/.223 Bolt Finish: Nitride Bolt Steel: Carpenter No. 158 Steel Profile: Full Auto Profile Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec Features The PSA Freedom Nitride BCG is made with a carpenter 158 bolt with a full-auto profile, designed to be used in AR-15 & M-16 style rifles. Bolt is magnetic particle inspected for a uniform quality and operational reliability. MPN#: 516446915

Complete BCG easily drops into a standard mil spec AR-15 upper, and it's ready to shoot. Magnetic particle inspected bolt gives long service life. Bolt and carrier feature a matte black phosphate finish that resists heat, wear and corrosion. Carrier is chrome lined and has a staked gas key attached. Includes bolt assembly, firing pin, firing pin retaining pin, cam pin and complete carrier. PLEASE NOTE: This Bolt Carrier Group WILL work with .300 AAC Blackout. However, you should check for proper headspacing before firing.

Carrier: Machined from 8620 steel & QPQ nitride/melonite treated. Improved carrier geometry with M16 profile. The QPQ nitride/melonite treatment hardens the surface to 70 RC and reduces friction, adding corrosion resistance inside and out. Bolt: 9310 & QPQ nitride/melonite treated. Shot peened precision ground diameters. Magnetic particle inspected and laser marked. Extractor machined from S7 tool steel. Crane extractor O ring to boost extraction clamping force. Gas key machined from billet 4140 with grade fasteners and staked to mil spec. Chrome plated firing pin per mil spec.

SKU KIT-0427 Model Number KIT-0427 UPC KIT-0427 Included in Bundle: 5165449729 Toolcraft Logo'd Premium 5.56 NiBr BCG with Carp158 Bolt Quantity 1 24080 PSA Premium Charging Handle - 24080 Quantity 1 2 Magpul Magazine PMAG 30, 5.56x45 Magazine - Black MAG571-BLK Quantity 10 DETAILS PSA Forged MIL-SPEC Charging Handle SKU: 24080 QTY: 1 Toolcraft 5.56 Nickel Boron BCG SKU: 5165449729 QTY: 1 Magpul PMAG 30rd Gen2 MOE 5.56 Magazines SKU: 2 QTY: 10 FEATURES PSA Forged MIL-SPEC Charging Handle

The Cross Machine Tool Co. complete bolt carrier group is a high quality upgrade for your next build. The carrier is machined from tough 8620 steel with a full mass M16/full auto for optimal reliability and strength. The 9310 steel bolt assembly is magnetic particle inspected. The complete assembly is ready to drop in to your favorite .223 Rem, .223 Wylde, 5.56 NATO, or 300 BLK build! Features: - 5.56 NATO / 300 BLK - M16-cut 8620 Carrier - 9310 Bolt Assembly - Magnetic Particle Inspected - Properly staked gas key - Salt bath nitride finish - Made in the U.S.A.

ALWAYS ARMED 308 BOLT CARRIER GROUP Made in the USA Compatible with DPMS Style AR10 .308 9310 Bolt 8620 Steel Carrier Salt Bath Nitride Finish

The KAK Industry 45 Bolt assembly is designed for AR-15 style rifles chambered for .45 ACP with a direct blowback system. This bolt is weighted with Tungsten weights adding up to 16 ounces total in order to eliminate the need for heavy buffers. This added weight is necessary for blowback firearms because it helps to delay the bolt from moving rearward just long enough for pressures to reach a safe level. Depending on your setup, it can also reduce felt recoil and reduce the amount of bolt bounce. It features a full size .308 style extractor that can be removed for cleaning.

100-026-351WB AR-15 Mil-Spec Bolt Carrier Group 5.56mm Left Hand Cartridge: 5.56 mm NATO Finish: Black Description Specs A Mil-Spec Upgrade For Left-Handed AR-15 Rifles The Stag Arms Left Handed AR-15 Bolt Carrier Assembly is designed to not only work with any left handed Stag Arms AR-15 rifle but also any AR-15 upper receiver designed for left-handed ejection. The manganese phosphate coated 8620 steel bolt carrier assembly is a wonderful option for your next left hand duty ready AR-15 build.

Description

The Lantac M-SPEC BCG is ideal for shooters who want to add a quality assembly to their next build. The bolt carrier group is constructed from high-quality 8620 steel and finished with black nitride for optimal durability and strength. This bolt carrier is precision machined to Mil-Spec dimensions and tolerances for optimal fit and performance. The Lantac carrier is case hardened and hard turned/ground so that its internal dimension are precisely military specifications. Additionally, the BCG is QPQ Nitrided for unrivaled corrosion resistance, durability and performance.

Description Low-Mass bolt carrier groups are a perfect choice for sporting or competition rifles tuned for ultimate recoil control and faster follow up shots. Because of their light weight, Low-Mass bolt carrier groups unlock and cycle faster and should be used in conjunction with an adjustable gas block to fine tune your action pressure and cyclic rate.

THIS MUST BE USED WITH A 11 OUNCE BUFFER OR HEAVIER WHEN USING A CARBINE SPRING. 45ACP UPPERS MUST HAVE AN ENLARGED EJECTION PORT. WHILE OUR 45 BOLT WILL ACCOMMODATE A JP SILENT CAPTURE SPRING. WE DO NOT RECOMMEND IT AS 45ACP CAN DAMAGE THE JP SYSTEM. Bolt. Made with 8620 AISI steel and boasting a Melonite finish, the Stern bolt fits into Mil-Spec and Glock-pattern upper receivers. It functions with Colt SMG, Glock magazines and it's fully compatible with standard AR15/M16 charging handles.

SKU: KIT-0421 Model Number: KIT-0421 UPC: KIT-0421 Included in Bundle: 5655103990 PSA Toolcraft 5.56 Phosphate MPI Full-Auto Bolt Carrier Group - No Logo Quantity 1 516447330 Hornady Frontier 5.56 Nato 55gr FMJ - 20 Rnds Quantity 10 DETAILS Toolcraft 5.56 Phosphate MPI Full-Auto BCG w/o Logo SKU: 5655103990 QTY: 1 Hornady Frontier 5.56 NATO 55gr FMJ Ammo, 20rds SKU: 516447330 QTY: 10 FEATURES Toolcraft 5.56 Phosphate MPI Full-Auto BCG w/o Logo

Description

Caliber: .223/5.56/300AAC Bolt Material: 9310 Steel MPI (Magnetic Particle Inspected) Bolt Finish: Nitride Black Oxide Extractor Part is a Completely Assembled Bolt (see pics) Manufacturer's Part#: SAABP013 All Parts Made in the USA

Charging Handle Features:AmbidextrousMaterial: 6061 T6 AluminumSteel LatchFinish: Type III Hard-Coat AnodizedPerfect Replacement for Any Factory Charging HandleOversize Release Levers on Both SidesNo Gun Smith RequiredCan Be Charged in Any Desired MotionBolt Carrier Group Features:Made in USACarrierM16 Style (Auto)Machined From 8620 Tool SteelHeat Treated to Military SpecificationBoltMachined From 9310 Tool SteelHeat Treated to MilShot PeenedGround to Meet Military Required TolerancesMPI (Mag Particle Inspected)Gas KeyMachined From 4140Heat Treated to Military SpecificationsExtractorMachined F

SKU KIT-0423 Toolcraft 5.56 Phosphate MI Full-Auto BCG w/o Logo SKU: 5655103990 QTY: 1 PMC X-TAC 62gr LAP 5.56 Ammo, 20rds SKU: 4793 QTY: 10 FEATURES Toolcraft 5.56 Phosphate MPI Full-Auto BCG w/o Logo This Toolcraft Bolt is made of Mil-spec Carpenter 158 steel, shot peened, and mag particle inspected. Gas key is chrome lined, phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Full-auto bolt carrier is phosphate coated and chrome lined. Made in the USA. Mil-Spec Carpenter No. 158® Steel Bolt Shot Peened; Mag Particle Inspected

Complete Black Nitride / Melonite Bolt Carrier Group for Ar15. Smooth & Protective Nitride coating.  This is for 1 BCG and 1 Charging Handle.  5.56/223 & 300 Blackout BCG  - M16 Carrier-8620 steel - Bolt-9310 steel - MPI Tested  - Shot Peened - Upgraded Extractor Spring with o-ring - Properly staked gas key  Choose Red or black Charging handle with extended latch Made in the USA Note: may have blems.  We do fully inspect the bcgs, check headspace with a good barrel, and test fire many from the batch to verify quality.. you may notice brass marks from test firing on some.     

.223 Bolt Assembly AR Specifications for Luth-AR AR Bolt Assy - Assembled: Additional Features: Assembled

The SAE 9310 of the JP EnhancedBolt is a superior steel alloy in virtually every way compared to the C-158, whether in its resistance to structural failure or life expectancy, both of which far exceeding the Mil-spec.

The R&D Precision Full Auto BCG was made in order to function as the ideal item for anybody in need of an outstanding choice. These Bolt Carrier Groups through the expert product experts at R&D Precision are fashioned working with dependable and reliable resources, in order to provide you with product which will be beneficial for quite some time. Designed using some of the best available components and engineering, these Bolt Carrier Groups through the product professionals at R&D Precision can last you an unbelievably long time.

NiB-X 224 M16/AR-15 Full Auto Bolt Carrier Group POLISHED All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMDs exacting specifications to provide the best BCG available. Specifically engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The BCG components are coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off.

The ODIN Works 9mm BCG is designed to work with both Colt and Glock style lowers and magazines. It also features the traditional style AR extractor that will give you long and reliable use. Specifications for ODIN Works 9mm Black Nitride Bolt Carrier Group: Color: Black Finish: Nitride Fabric/Material: Steel Caliber: 9mm Luger Gun Model: AR-15

Fabricated to be regarded as a great product for nearly anyone, we are certain you are going to appreciate the Luth-AR Full Auto AR Bolt Carrier . These Bolt Carrier Groups through the expert product specialists at Luth-AR are fashioned by using dependable and efficient components, to be able to supply you with a product that is going to be powerful for quite some time. Made utilizing some of the most useful accessible substances and design, these particular Bolt Carrier Groups through the product specialists at Luth-AR can last an incredibly lengthy time.

If you're shopping for a fantastic price for the Luth-AR LR Bolt Carrier, then you have found yourself in the right spot. Established working with some of the most heavy duty and dependable components around, these Bolt Carrier Groups by Luth-AR offers you something that will give many years of reliability. Luth-AR has been making high quality products for a very long time, and the Luth-AR LR Bolt Carrier is their very own approach to demonstrating just how much they are concerned.

Midwest Industries Bolt Carrier Groups come in Black Nitride, Nickel Boron, DLC Flat Dark Earth and Titanium Nitride! The Carpenter 158 Bolt is heat treated, shot peened, precision ground for perfect dimensions, and MPI Tested. The 4140 Billet Gas Key is properly torqued with Grade 8 fasteners, and properly staked to ensure reliability. The 4140 Billet Cam Pin is nitride treated for wear resistance. The Billet Machined Extractor is machined from solid 4140 bar stock, heat treated and shot peened, coated for reliable extraction, extractor insert, and O-Ring are included.

Foxtrot Mike Products offers the highest quality materials and manufacturing processes available. This Premium 45 Cal Bolt Carrier Assembly is compatible with all 45 Cal Pistol Caliber AR builds. Maintaining a harder core than standard 8620 steel, this carrier is machined from Premium 4340 Steel. The outside diameter is precision ground prior to machining in a per-hardened state for improved tolerances post machining and coating. A long duration salt bath nitride finish is applied for a long service life and superior corrosion resistance.

CompleteBolt Carrier group for M-16. made from 8620 Steel and coated per Mil-Spec. Assembly includes a staked gas key, chrome-lined carrier and gas key and bolt assembly. 9mm does not require bolt.

The KVP 40 S&W and 10mm BCG is a feature packed solution for your Blow Back Carbine or Pistol. Our BCG is compatible with Glock style magazines. The carrier is constructed of made in specialized factories 8620 steel, with a Nitride QPQ finish. The QPQ finish offers excellent wear and weather resistant properties that are superior to lower grade phosphate finishing processes. We've added a beefier firing pin retention spring to help lower the likely hood of firing pin breakage.

NiB-X M16/AR-15 Full Auto Bolt Carrier Group - POLISHED All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMD's exacting specifications to provide the best BCG available. Specifically engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The BCG components are coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off.

Charging Handle Features: Ambidextrous Material: 6061 T6 Aluminum Steel Latch Finish: Type III Hard-Coat Anodized Perfect Replacement for Any Factory Charging Handle Oversize Release Levers on Both Sides No Gun Smith Required Can Be Charged in Any Desired Motion Bolt Carrier Group Features: Made in USA Carrier M16 Style (Auto) Machined From 8620 Tool Steel Heat Treated to Military Specification Bolt Machined From 9310 Tool Steel Heat Treated to Mil Shot Peened Ground to Meet Military Required Tolerances MPI (Mag Particle Inspected) Gas Key Machined From 4140

This bolt assembly is compatible with the JP LRP-07 and the DPMS LR-308 platforms (or clones thereof) only and cannot be used to replace bolts in the Armalite AR-10 platform (or clones thereof). This bolt uses a specialized firing pin that is not compatible with other bolts nor can it use standard .308 firing pins. Specifications for JP Enterprises High Pressure Enhanced Bolt Assembly: Color: Black Finish: Black DLC Fabric/Material: SAE 9310 Steel Caliber: .308 Caliber Reloading Caliber: .308 Caliber

For a smoother shot at a reasonable price choose a Bootleg Inc Adjustable Carrier to modify your firearm. These Bolt Carrier Groups from the fine people at Bootleg Inc is full auto rated for strength and to prevent erosion. With a 4 setting adjustable vent system the Bootleg Inc Four Position Carrier prevents excessive gas pressure from causing a blowback. Whether you're a connoisseur or a novice a Bootleg Inc Complete Bolt Carrier Group is perfect for those who need to adjust on the go. Specifications for Bootleg Inc Four Position Adjustable Carrier, AR-15, Complete:

Engineered specifically for pistol caliber ammunition, not modified from an existing platform, increasing functionality, reliability and overall performance. Specifications for Quarter Circle 10 9x19mm Universal Bolt Assembly: Color: Black Nitride Fabric/Material: 8620 Steel Bolt Caliber: 9mm Luger Gun Make: Universal Gun Model: Universal

Made For - Not Modified. Every QC10 product is engineered specifically for pistol caliber ammunition, not modified from an existing platform, increasing functionality, reliability and overall performance. Specifications for Quarter Circle 10 .40 S&W/10mm Auto Bolt Assembly: Color: Black Nitride Fabric/Material: 8620 Steel Bolt Caliber: .40 S&W Gun Make: Smith & Wesson

Made For - Not Modified. Every QC10 product is engineered specifically for pistol caliber ammunition, not modified from an existing platform, increasing functionality, reliability and overall performance. Specifications for Quarter Circle 10 .45 ACP Glock Style Bolt Assembly: Color: Black Nitride Fabric/Material: 8620 Steel Bolt Caliber: .45 ACP

AR10 Full Auto Style for increased mass and lock time. Our DPMS Style 308 BCG is precision machined from 8620 Steel with a 9310 Precision Hard Ground Bolt. The entire carrier assembly is NiB, Electroless Nickel Boron coated with the patented, advanced UCT EXO process, unlike standard NiB coatings.

9310 Steel MPI Bolt .223/5.56 Caliber Mil-Spec Precision Machined 7075 Polished Aluminum Carrier Anodized Finish - Red Lightweight 5.9oz Reduces recoil / increase cycle speed Competition Shooting Design NO FULL AUTO CAPABLE Fits: AR-15 / .300BLK

Non-ferrous specialty carriers should be considered consumable rather than lifetime parts. The JPBC-1 yields a performance advantage for competition applications at a price. Your usage and maintenance will determine the duty life of your carrier. The JPBC-1 is a competition/race gun part only and is not recommended for any duty/defense use where absolute reliability is required. This carrier should also be run with an adjustable gas system to minimize stress on the entire bolt carrier assembly.

Machined to the same exacting tolerances as our bolt carriers, the JP Enterprises Second Generation 9mm JPBC Bolt Carrier Group is an entirely new design that eliminates the need for a central mass (slug) to readily function with their 9mm JP Silent Captured Spring. Without compromising bolt weight and reliability, these Bolt Carrier Groups by JP Enterprises combined with the JPSCS-9MM provides you with the heaviest, most reliable 9mm operating system that dramatically reduces bolt bounce while improving accuracy. The JP Enterprises JPBC Bolt Assembly is .9 oz.

The bore of the Stainless Bolt Carrier has a roller burnished finish for frictionless operation with no chance of peeling chrome as in standard Mil-Spec carriers. The exterior bearing surfaces are hand polished. Features a 100% increase in bearing surface for smoother operation and improved alignment with less wear on the upper receiver. Comes with the key installed and is milled from 416 Stainless Steel. Specifications for JP Enterprises Stainless Full Mass Tactical Carrier: Finish: Black Additional Features: with QPQ without buffer for 6.5 Grendel

The JP Enterprises Small Frame Low Mass BCG is made from durable stainless steel and is equipped with the JP EnhancedBolt which improves on the Mil-Spec bolt for an extended lifespan. These Bolt Carrier Groups by JP Enterprises are complete with a low mass carrier perfect for small frame 6.5 Grendel caliber rifles. The JP Enterprises 6.5 Grendel LMOS Bolt Carrier Group is complete with a cam pin, firing pin, and a firing pin retainer. Choose the JP Enterprises Enhanced BCG for an advanced bolt carrier to increase the performance of your favorite rifle. J5-BCG-GRNF-JPBC-3A-6-5G

Enhanced 9mm AR Bolt, combined with a Silent Captured Spring System.New to this revision of our JPBC-9SL and JPBC-9SL-SP bolt assemblies is last round holt open compatibility with our line of short-stroke Silent Captured Springs. This bolt assembly will provide reliable last-round lockback with any compatible receiver such as our GMR-15. Specifications for JP Enterprises EnhancedBolt 9mm AR Bolt Carrier Group Kit - JP Standard Silent Capture Spring: Fabric/Material: 416R Stainless Steel Caliber: 9mm Luger Included Accessories: 3 x Steel Masses, 2 x Tungsten Masses

Complete Bolt Carrier Group Including Jpbc-6H Vmos Carrier, Jpeb-223 Enhanced .223/5.56 Bolt, Jpcp-223 Enhanced Cam Pin, & Jpfprp-223 Enhanced Firing Pin Retaining Pin. For difficult setups like suppressed rifles and exotic caliber chamberings, some degree of mass regulation is required for optimal performance. This is especially true in the absence of an adjustable gas block. Residual gas and excessive fouling can grind your rifle to a stop. One size never fits all when it comes to gas-operated rifles.

Full Mass Operating SystemFor police duty or any application where absolute reliability is the main criteria, our 416 stainless steel Full Mass Operating System (FMOS) carrier design is the top of the line. The JPBC-2 has every strength an operator expects from a Mil-spec. carrier matched up with improvements born from decades of shooting and engineering experience.

For difficult setups like suppressed rifles and exotic caliber chamberings, some degree of mass regulation is required for optimal performance. This is especially true in the absence of an adjustable gas block. Residual gas and excessive fouling can grind your rifle to a stop. One size never fits all when it comes to gas-operated rifles. The Variable Mass Operating System (VMOS) carrier ensures reliability through additional reciprocating mass but provides more custom tunability.

BCG/CH: + Mercury Precision LR-308 .308 WIN/ 6.5 Creedmoor Bolt Carrier Group - Nickel Boron + Ambidextrous Charging Handle, AR10, Black The Charging Handle on the DPMS LR-308 / AR-10 rifle is a simple latching design that indexes with the gas key on your bolt carrier group, this allows you to charge your rifle, eject and feed rounds manually. About this Charging Handle: This Davidson Defense 'Eyelet' Ambidextrous LR-308 / AR-10 Charging Handle is made from 7075-T6 Aluminum with a type 3 hard coat anodized finish for long-lasting durability.

BCG/CH: LR-308 .308 WIN/6.5 Creedmoor Bolt Carrier Group + Ambidextrous Charging Handle, AR10, Black Ambidextrous Charging Handle, AR10, Black The Charging Handle on the DPMS LR-308 / AR-10 rifle is a simple latching design that indexes with the gas key on your bolt carrier group, this allows you to charge your rifle, eject and feed rounds manually. About this Charging Handle: This Davidson Defense 'Eyelet' Ambidextrous LR-308 / AR-10 Charging Handle is made from 7075-T6 Aluminum with a type 3 hard coat anodized finish for long-lasting durability.

Odin Works 6.5 Grendel Type 2 Black Nitride Bolt Carrier Group Bolt Finish: Salt Bath Nitride Bolt Material: 9310 Steel Brand: Odin Works Caliber Gauge: 6.5 Grendel Carrier Finish: Salt Bath Nitride Carrier Material: 9310 Steel Carrier Carrier Style: M16 / Full Auto Gas Key: Staked High Pressure Tested: yes Magnetic Particle Inspect: Yes SKU#: ACC-6.5-BCG

9310 Steel MPI Bolt .223/5.56 Caliber Mil-Spec Precision Machined 7075 Polished Aluminum Carrier Anodized Finish - Bright Blue Lightweight 5.9oz Reduces recoil / increase cycle speed Competition Shooting Design NO FULL AUTO CAPABLE Fits: AR-15 / .300BLK

Description A quality upper assembly without cutting corners. This means starting with a top tier mil-spec forged upper receiver, using a steel gas block as opposed to aluminum, quality American Made M-LOK handguards (handguard style may vary) and one of the nicest nitrided A2s you’ll find anywhere. This also means taking the time to ensure that the upper will function reliably. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device.

Item : 101914 SKU : RA1011BLK Model : Bolt Carrier Group UPC : 851046006033 Rise Armament's advanced bolt-carrier group (BCG) is manufactured with precision and individually inspected to ensure high-level performance. It is individually MPI tested and constructed of tool steel. This model is compatible with your AR-15 and has a black nitride finish. Manufacturer Rise Armament Pricing Unit EA Model Bolt Carrier Group UPC 851046006033 SKU RA1011BLK Width 3.7000 Length 10.8000 Height 1.6000 Weight 0.8050 Caliber 223 Rem Ar-15 Accessory Y Dimension 1.60 X 3.80 X 10.70

MMC Armory AR-15 5.56/.223/.300/.350 Nickel Boron Bolt Head w/ Nitride Bolt Carrier Group SPECIFICATIONS: Brand: MMC Armory Platform: AR-15 Caliber Compatibility: 5.56 NATO, .223 Rem, .300 BLK, .350 Legend Bolt Head Material: 9310 Alloy Steel Bolt Head Finish: Nickel Boron Body Material: 8620 Alloy Steel Body Finish: Nitride Style: Standard Gas System: Direct Impingement Forward Assist Cuts: Yes Full Auto Compatible: Yes Sign Up for our Newsletter and receive an additional COUPON CODE for another purchase

Complete Nickel Boron Full Auto Bolt Carrier Group. 5.56/223 & 300 Blackout BCG. The nickel boron coating is excellent, extremely low friction and easy to clean.  The coating is a high quality, Shiny high gloss coating like WMD & FailZero bcgs.  - M16 Carrier-8620 - Bolt-9310 - MPI Tested  - Upgraded Extractor Spring with o-ring - Properly staked gas key Made in the USA by a quality manufacturer. You may find cheaper nickel boron bcgs, but many of those have a dull, flaky satin finish.  These are hard and high gloss and super smooth.        Item #: nibobcg

Mil-Spec Carpenter No. 158® Steel Bolt Shot Peened; Mag Particle Inspected Chrome Lined Full-Auto Carrier Chrome Lined Gas Key; Hardened to USGI Specifications Secured with Grade 8 Hardened Fasteners Staked Per Mil-Spec ** These bolt carrier groups will have cosmetic blemishes that do not affect function. This may include, but is not limited to, scratches or slight variation in the finish color coat. FEATURES

The Faxon 9mm Bolt Carrier Group is the perfect choice for your pistol caliber carbine. This Gen 2 BCG is a full mass carrier, fully heat treated, with a salt bath nitride finish. This bolt carrier group is compatible with both Glock and Colt style lower receivers. NOTE: Faxon Firearms recommends the use of MIL-SPEC triggers with their Gen 2 9mm BCG. Faxon's 9mm BCG is not compatible with Spike's Tactical Colt 9mm lower receivers. Features: - Compatible with Glock and Colt style lower receivers - Removable carrier weight - Mil-Spec 8620 steel carrier - Heat treated

Details Caliber: 6.5 Grendel Bolt Steel: 9310 Finish: Nitride Carrier: 8620 Steel Gas Key: Nitride Treated & Properly Staked with Grade 8 Fasteners Features Functions with all PSA 6.5 Grendel Uppers.  9310 steel bolt assembly, nitride treated for durability.  8620 carrier, nitride treated, with a nitride treated gas key properly staked with grade 8 fasteners. MPN#: 5165451022