Coated Bolt Carrier Group BCG (full auto version) for AR15, M16, or M4 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 6.5mm Grendel II Bolt Carrier Group (BCG) – Complete: Manufacturer: Cryptic Finish: Chrome Plated Fabric/Material: 8620 Aircraft Quality Steel, Carpenter 158 Steel Cartridge: 6.5mm Grendel II Gun Make: AR Platform Gun Model: M16, M4, AR-15 Hand: Ambidextrous Additional Features: Thickness – 2-3 microns Included Accessories: Standard Condition: New Weight: 11.55 oz Bolt Material: Steel Carrier Material: 8620 Steel Features of Cryptic 6.5mm Grendel II Bolt Carrier Group BCG – Complete Reduced Carbon Fouling; Easier Cleaning; Full Auto Carrier (Backward compatible with all semi-auto rifles) Package Contents: Cryptic 6.5mm Grendel II Bolt Carrier Group – Complete Gas Key Key Staked with Grade 8 Screws Bolt w/ Spring and Ejector Extractor w/ Spring and viton O-ring Firing Pin Cam Pin
Rallen –
These BCG’s are definitely worth the cost. With Nickel Boron being their lowest grade of coating, you can imagine how slick the mystic are. Two drops of your favorite lube and have fun. Clean up is comical with a quick puff of air and a wipe. After seeing one of these with 750k rounds on it and looking new, I was a believer.
Hollow –
It does everything thing it says in the description. Solid and very well made.
AJ –
Awesome BCG, barely needs lube! Cleaned it to dry, put very little tri-flow on it. So smooth!