The Stern Defense 004SDBU9NIBECHOD2M 9mm NIB/Mag Phosphate Hybrid Bolt Carrier Group is built for shooters who want reliable 9mm performance in their AR15/M16 platform. Machined from 8620 AISI steel...

The Stern Defense SD BU9 9mm Complete Bolt Mag-Phosphate is a dedicated bolt carrier group engineered for AR-15 and AR-9 builds that run Glock or Colt SMG magazines. Machined from durable 8620 AISI...

The Vktr Industries V20090719002RP Direct Impingement Bolt Carrier Group brings a refined, hard chrome upgrade to the AR-15 platform. Precision CNC machined from 8620 steel and finished in thin dense...

The Lead & Steel LSBCGN Bolt Carrier Group 5.56 Nitride AR-15/M-16/M-4 is a complete, drop-in carrier assembly designed for dependable cycling in standard AR pattern rifles. Built from alloy steel...

The VKTR Industries Duty Match Bolt 5.56 is a precision-engineered AR-15 bolt designed to blend match-grade accuracy with dependable performance. CNC machined from heat-treated 9310 alloy steel, it...

The TacFire MAR120 Firing Pin 5.56x45mm NATO Hard Chrome Steel for AR15/M16 is a precision-machined replacement pin built to keep your AR-15 or M16 running smoothly. Crafted from durable 4140 steel...

The TacFire MAR145 BCG Gas Key for 5.56x45mm NATO is a mil-spec replacement carrier key engineered for AR-15 bolt carrier groups. Built from durable steel with a corrosion-resistant phosphate...

The LBE Unlimited M16BLT Complete BCG M-16 Style 5.56x45mm NATO Black Phosphate 8620 Steel M16 is a ready-to-run bolt carrier group built for dependable performance in AR-15 and M16-style rifles...

The Lmt Defense AR-15 5.56mm Full Auto Bolt Carrier Group Black is built to the same standards LMT supplies to military and professional users. This M16-pattern carrier group is designed for 5.56x45...

The Fightlite Industries MCR Firing Pin Retaining Pin is a purpose-built replacement component engineered specifically for the MCR bolt assembly. Designed to securely retain the firing pin, this...

The LWRC Advance Duty Bolt 6.8 SPC Alloy is a purpose-built replacement bolt engineered for LWRC rifles chambered in 6.8mm, including the Six8 series and legacy M6 rifles with 6.8 SPC barrels...

The LMT Defense Full-Auto Enhanced 5.56mm Bolt And Bolt Carrier Group Black is engineered for shooters who demand dependable cycling from their AR-15 platform. Built around an M16-style carrier and a...