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™New
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™ AR-15 Bolt Carrier Group – 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™ Mil-Spec AR-15 Firing Pin
AT3 Hard Chrome Firing Pin The AT3™ Mil-Spec AR-15 Firing Pin is a premium replacement component for your AR-15. This component is guaranteed to fit and function in your AR... -
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 – 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... -
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 – 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... -
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,... -
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... -
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,... -
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... -
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 -
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... -
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... -
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... -
AT3™
AT3 Upper Receiver Black + AT3 Bolt Carrier Group + Breek Arms Warhammer Charging...
Complete your Next Build with AT3's Top-Selling Billet Upper Receiver and BCG plus the Trusted Breek Arms Warhammer Charging Handle Save by bundling vs purchasing the parts individually, plus free... -
CMMG 8 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... -
Sons of Liberty Gun Works Bolt Carrier Group – .223/5.56 NATO
The Best AR-15 BCG Upgrade From Sons Of Liberty Gun Works The Sons of Liberty Gun Works Bolt Carrier Group is a high-quality BCG upgrade made to the highest standards... -
Faxon Firearms 6.5 Grendel Type 2 Bolt Carrier Group – 9310 Steel – Black...
Improved Bolt-Carrier Group for Your Next 6.5 Grendel Rifle The Faxon Firearms 6.5 Grendel Type 2 Bolt Carrier Group is a high-quality upgrade designed specifically for the 6.5 Grendel cartridge,... -
WMD M16 Bolt Carrier Group – NiB-X Finish
WMD Bolt Carrier Groups can provide a significant upgrade to an existing rifle, and the foundation of a quality AR-15 build. All WMD BCG components are manufactured by Defense Industrial... -
CMMG 16.1 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...
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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