Bolt carrier group for AR15, M16, or M4 compatible with semi and full auto versions. Carrier is machined from Mil-Spec 8620 tool steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the Mil-Spec chrome lined and heat treated gas key. Gas key is sealed then secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This insures proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel then shot peened for increased strength per Mil-Spec; includes tool steel extractor with Wolff spring, viton O-ring , black insert; tool steel ejector pin spring; firing pin chromed finished with firing pin retaining pin and cam pin. Total weight completely assembled 8.2oz. HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).
Complete Mil-Spec Bolt Carrier with Bolt Assembly HPT/MPI Tested:
Really awesome bolt carrier. The extra 3-4 ounces I save compared to the standard is a nice bonus. I'm running an slr titanium adjustable gas block, vltor a5 buffer h2 weight system, and now this lightweight carrier. Might need to tweak around the mass/gas block to find the sweet spot,but I'm hopeful for this product to perform and last long beyond my expectations. Unknown on 18th Jul 2017
Slicker than ky. Cleaned up back to new after just using a dry paper towel and the polishing rag after shooting 400 rounds suppressed 300blkout. This makes my 4th cryptic bcg purchase and don't plan on switching anytime soon. David C. on 7th Jul 2017