Coated Bolt Carrier Group BCG (full auto version) for AR10 (.308 WIN / 7.62x51mm / 6.5 Creedmoor) machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the proper chrome lined and heat treated gas key. Gas key is secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures a strong staking and proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158 steel and shot peened for increased strength per Mil-Spec. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Specifications for Cryptic .308 WIN/7.62x51mm/6.5 Creedmoor Bolt Carrier Group (BCG) – Complete: Manufacturer: Cryptic Finish: Chrome Plated Fabric/Material: 8620 Aircraft Quality Steel, Carpenter 158 Steel Cartridge: 7.62x51mm NATO, 6.5mm Creedmoor, .308 Winchester Gun Make: AR Platform Gun Model: DPMS LR-308, AR-10 Hand: Ambidextrous Included Accessories: Standard Condition: New Weight: 17.8 oz Bolt Material: Steel Carrier Material: 8620 Steel Features of Cryptic .308 WIN/7.62x51mm/6.5 Creedmoor Bolt Carrier Group BCG – Complete Reduced Carbon Fouling; Easier Cleaning; Full Auto Carrier (Backward compatible with all semi-auto rifles) Package Contents: Cryptic .308 WIN/7.62x51mm/6.5 Creedmoor Bolt Carrier Group – Complete Gas Key Key Staked with Grade 8 Screws Bolt w/ Spring and Ejector Extractor w/ Spring Firing Pin Cam Pin
Orin –
Hoping to save someone a trip to the post office. Absolutely beautiful BCG. Very well made, gorgeous silver/chrome color. Very slick in the hand. To bad it doesn't fit my rifle. Please someone tell me why everything sig makes is proprietary??
El –
It’s a good BCG, I paid 350 at a gun shop for mine on a 308 build, and after a 1000 rounds and no cleaning it runs great. I would highly recommend. If you get the right coating cleaning is a breeze, as it just wipes right off, and I know there are others that are cheaper but this by far is one of the best ones I’ve seen and used. And it’s guaranteed dependable.
Sgt. Gray Beard –
Nice BCG, it runs very smooth in a Aero M5 upper. The coating is top notch and slick with very even surface. The machine work looks great with no visible flaw's. The bolt fit to BCG is perfect as well as firing pin strike depth. We will see how it holds up long term. So far so good!
Rick –
This brand i run on my rifles and they never fail to disappoint. Easy to clean and built to run. It's worth the price �
Rick –
One of the top performing bcgs out there right now, especially suppress love this thing!
John –
Recommended looks great, works great, super tight rings on the bolt