AR-15 Bolt Carrier Groups
High-quality AR15 Bolt Carrier Group (BCG) at Affordable Prices
The bolt carrier group controls all functions of the AR15 – chambering, firing, and extracting spent rounds. Choose wisely with AT3 Tactical.
The majority of weapon failures stem from issues with the bolt carrier group, and a good bolt carrier group can keep the failures to a minimum. READ MORE
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AT3™
AT3™ AR-15 Bolt Carrier Group (BCG) – 5.56 NATO/.300 Blackout – Black Nitride
AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group Getting a high quality bolt carrier group (BCG) that runs well in your rifle is... -
AT3™
AT3™ Black Nitride 5.56 Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle
AT3 Black Nitride BCG + Breek Warhammer AR-15 Charging Handle The AT3 Tactical BCG and Breek Warhammer Charging Handle pair perfectly to complete your AR-15 upper receiver. Save on this...8 Options -
AT3™NEW
AT3™ Black Nitride 9mm Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle
AT3 9mm Nitride BCG + Breek Warhammer AR-15 Charging Handle Save on this bundle to take your PCC build to the next level, with a reliable 9mm bolt and excellent...8 Options -
AT3™
AT3™ AR-15 Replacement Bolt – 5.56 NATO/.300 Blackout – Black Nitride
AT3 Replacement AR-15 Bolt This AR-15 replacement bolt from AT3 Tactical easily replaces a broken bolt in your rifle. This bolt comes complete with extractor and ejector assemblies already installed... -
AT3™
AT3™ Slick Side AR-15 Upper with Black Nitride 5.56 Bolt Carrier Group
AT3 Black Nitride Bolt Carrier Group with Slick Side Billet Upper - 8 Colors to Choose From Get a head start on your build with the AT3 Black Nitride Bolt...8 Options -
Luth-AR One Piece Helical Gas Ring for AR-15 Bolts
AR-15 Helical Gas Ring The Luth-AR One Piece Helical Gas Ring for AR-15 rifles seals your gas system more effectively than older style gas rings. This stainless steel coil doesn't... -
AT3™
AT3™ AR-15 Bolt Carrier Group – 5.56 NATO/.300 Blackout – Nickel Boron
Get the Performance You Need with a Nickel Boron Bolt Carrier Group Whether you're starting a fresh build or upgrading from stock, a bolt carrier group that performs reliably is... -
CMMG AR-15 Bolt Rehab Parts Kit
Easily Repair your AR-15 Bolt with CMMG Parts The bolt is one of the most crucial pieces of your rifle, perhaps the most. If your bolt fails, for whatever reason,... -
AT3™
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Nickel Boron
Run Your 6.5 Grendel or 6mm ARC Upper Right with a NiB BCG It's important to have a bolt carrier group that has everything you need. MPI inspected bolt, properly... -
Aero Precision AR-15 Black Nitride Bolt Carrier Group
Aero Precision 5.56 Nitride Bolt Carrier Group Aero Precision makes high quality parts suitable for any build, and this BCG is no exception. This part features a slick, easy-to-clean black...2 Options -
Aero Precision PRO Series AR-15 Black Nitride Bolt Carrier Group
Go PRO - The Best BCG that Aero Precision has to Offer The Aero Precision PRO 5.56 Bolt Carrier Group represents the best value for the most prolific, high-volume shooters.... -
Faxon Firearms 9mm Nitride Bolt Carrier Group – Glock & Colt Compatible
Proven, Reliable, and Compatible with Glock and Colt Lowers Faxon's 2nd Generation 9mm Bolt Carrier Group stands above its competition as a reliable part with wide compatibility. The enhanced geometry... -
LBE Unlimited AR-15 Bolt Gas Rings, Set of 3
AR-15 Bolt Gas Rings (set of 3) Gas rings are an essential part of the AR-15 Bolt and are often some of the first parts to need replacement. Easy to... -
Odin Works .223/5.56 Black Nitride AR 15 Bolt Carrier Group
High-Quality BCG Upgrade For .223/5.56 & 300 Blackout The Odin Works .223/5.56 Bolt Carrier Group is a high-quality upgrade for Mil-Spec BCG that fits AR-15/M4 pattern rifles in .223 Remington,... -
AT3™
AT3 Tactical™ 9mm Bolt Carrier Group – Nitride
High-Quality Black Nitride Bolt Carrier Group For Your 9mm Build This AT3 Tactical™ 9mm Bolt Carrier Group features meticulous machining and a high-quality finish for a lifetime of use. This... -
Faxon Firearms 5.56 M16 Complete Bolt Carrier Group – Black Nitride
Black Nitride Faxon BCG for 5.56, .300 BLK, and .350 Legend This Faxon Firearms Bolt Carrier Group is a complete high-quality BCG upgrade designed for AR15/M16 platforms chambered in 5.56×45... -
AT3™
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Black Nitride
Complete your hard-hitting 6.5 Grendel or 6mm ARC upper with a Black Nitride Bolt Carrier Group Our new 6.5 Grendel Bolt Carrier Group features a black salt bath nitride finish,... -
Luth-AR One Piece Helical Gas Ring for AR-10 Bolts
AR-15 Helical Gas Ring The Luth-AR Helical Gas Ring for AR-10/LR308 rifles effectively seals your gas system for more reliable function. This stainless steel coil doesn't need to be aligned... -
Bootleg Inc Four Position Adjustable AR-15 Bolt Carrier Group – 5.56 NATO/.300 BLK
High-Performance BCG Upgrade From Bootleg For Less Gas The Bootleg Inc Bolt Carrier Group is an innovative upgrade for Mil-Spec BCG that fits AR-15/M4 pattern rifles in .223 Remington, 5.56... -
LBE Unlimited AR-15 Firing Pin
LBE Unlimited AR-15 Firing Pin Compatible with mil-spec AR-15 bolts, the LBE Firing Pin is easy to clean, durable, and reliably strikes primers. Steel with a chrome plating makes scraping... -
Battle Arms Development Enhanced AR-15 Cast Bolt Catch
Battle Arms Development Enhanced AR-15 Cast Bolt Catch The Battle Arms Development Enhanced AR15 Cast Bolt Catch is an easy to install upgrade to a standard mil-spec bolt catch. The... -
Aero Precision .308/7.62 Black Nitride Bolt Carrier Group for AR-10
The Ideal BCG Upgrade For .308/7.62 Platforms The Aero Precision .308/7.62 Bolt Carrier Group is the ideal upgrade from a Standard BCG to improve the overall performance and reliability on... -
CMMG 5 Inch MKGS Barrel & Radial Delayed BCG Kit for AR15 – 9MM
Radial Delayed BCG Kit For Lesser Recoil And Lighter Performance The CMMG MKGS Barrel and BCG Kit will allow you to build a Pistol Caliber Carbine using a Patent Pending... -
Aero Precision .308/7.62 Nickel Boron Bolt Carrier Group for AR-10 – No Logo
Eye-Catching Nickel Boron BCG For AR-10 Builds The Aero Precision .308/7.62 Nickel Boron Bolt Carrier Group is an eye-catching addition to AR-10 builds that feature precise dimensions and superior coating...
Other AR-15 Upper Receiver Components:
AR 15 Charging Handles
AR 15 Gas Blocks & Tubes
AR 15 Handguards & Quad Rails
AR-15 Barrels
AR-15 Bolt Carrier Groups
AR-15 Front Grips
AR-15 Upper Receivers and Parts
Muzzle DevicesAR-15 Handguard Accessories
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