San Tan Tactical Enhanced Bolt Carrier Group 6MM ARC, Black Nitride Finish - STT-Enhanced BCG-6ARCSan Tan Tactical$182.85
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CMC Triggers
The CMC Triggers Suppressor Optimized Enhanced Bolt Carrier Group for AR-15 6mm ARC is purpose-built for shooters running suppressors or short-barreled rifles who demand reliability and smooth operation. Unlike generic mil-spec carrier groups, CMC's enhanced design addresses the real challenges of suppressed shooting: increased back-pressure, extended dwell time, and carbon buildup. This carrier group combines a reinforced 8620 steel carrier with a precision 9310 bolt, both finished in durable black nitride and engineered to handle the harder recoil impulse and fouling that comes with can-equipped rifles and short barrels.
The enhanced carrier features a flared rear geometry that reduces carrier cant during recoil and strategic relocation of bearing surfaces to improve reliability under suppressed fire. CMC reduced the contact points between carrier and receiver, lowering friction while the increased carrier mass ensures proper gas pressure and dwell time for consistent extraction—especially critical when running a can. The bolt itself is held to tight tolerances with CNC-ground external surfaces and a precision-finished "trumpet" area behind the gas rings, making field cleaning easier and extending component life. You get a hardened 4340 cam pin, mil-spec 8740 firing pin, mil-spec extractor spring with O-ring, and the works are MPI and HPT tested.
This is the right choice if you're building or upgrading a 6mm ARC rifle that'll wear a suppressor or sport a short barrel, and you want a carrier group that's been engineered specifically for those conditions rather than a one-size-fits-all alternative.
| Carrier Material | 8620 Case-Hardened Steel |
| Bolt Material | 9310 Case-Hardened Steel |
| Cam Pin Material | 4340 Hardened Steel |
| Firing Pin Material | Mil-Spec 8740 Steel |
| Finish | Black Nitride |
| Compatibility | AR-15 Platform, 6mm ARC |
| Testing | MPI and HPT Tested |
Yes. The CMC enhanced carrier is specifically designed for suppressed rifles with enlarged forward ports, increased mass for proper dwell time, and a flared rear geometry that reduces carrier tilt during the harder recoil impulse of suppressed fire. The precision-finished gas ring trumpet area also makes cleaning suppressor carbon easier.
Yes. The increased carrier mass and optimized dwell time make this group well-suited for short-barreled rifles, where reliable extraction can be challenging due to reduced gas pressure.
You receive the enhanced carrier, 9310 bolt, hardened 4340 cam pin, mil-spec 8740 firing pin, and mil-spec extractor spring with O-ring. All components are finished in black nitride and have been MPI and HPT tested.
Yes, this carrier group is 6mm ARC compatible and designed for AR-15 platforms using that caliber.
CMC Triggers
The CMC Triggers Suppressor Optimized Enhanced Bolt Carrier Group for AR-15 6mm ARC is purpose-built for shooters running suppressors or short-barreled rifles who demand reliability and smooth operation. Unlike generic mil-spec carrier groups, CMC's enhanced design addresses the real challenges of suppressed shooting: increased back-pressure, extended dwell time, and carbon buildup. This carrier group combines a reinforced 8620 steel carrier with a precision 9310 bolt, both finished in durable black nitride and engineered to handle the harder recoil impulse and fouling that comes with can-equipped rifles and short barrels.
The enhanced carrier features a flared rear geometry that reduces carrier cant during recoil and strategic relocation of bearing surfaces to improve reliability under suppressed fire. CMC reduced the contact points between carrier and receiver, lowering friction while the increased carrier mass ensures proper gas pressure and dwell time for consistent extraction—especially critical when running a can. The bolt itself is held to tight tolerances with CNC-ground external surfaces and a precision-finished "trumpet" area behind the gas rings, making field cleaning easier and extending component life. You get a hardened 4340 cam pin, mil-spec 8740 firing pin, mil-spec extractor spring with O-ring, and the works are MPI and HPT tested.
This is the right choice if you're building or upgrading a 6mm ARC rifle that'll wear a suppressor or sport a short barrel, and you want a carrier group that's been engineered specifically for those conditions rather than a one-size-fits-all alternative.
| Carrier Material | 8620 Case-Hardened Steel |
| Bolt Material | 9310 Case-Hardened Steel |
| Cam Pin Material | 4340 Hardened Steel |
| Firing Pin Material | Mil-Spec 8740 Steel |
| Finish | Black Nitride |
| Compatibility | AR-15 Platform, 6mm ARC |
| Testing | MPI and HPT Tested |
Yes. The CMC enhanced carrier is specifically designed for suppressed rifles with enlarged forward ports, increased mass for proper dwell time, and a flared rear geometry that reduces carrier tilt during the harder recoil impulse of suppressed fire. The precision-finished gas ring trumpet area also makes cleaning suppressor carbon easier.
Yes. The increased carrier mass and optimized dwell time make this group well-suited for short-barreled rifles, where reliable extraction can be challenging due to reduced gas pressure.
You receive the enhanced carrier, 9310 bolt, hardened 4340 cam pin, mil-spec 8740 firing pin, and mil-spec extractor spring with O-ring. All components are finished in black nitride and have been MPI and HPT tested.
Yes, this carrier group is 6mm ARC compatible and designed for AR-15 platforms using that caliber.
