Coated bolt carrier group (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; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin.
HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).
Complete Mil-Spec M-16 Bolt Carrier with Bolt Assembly HPT/MPI Tested:
(This one is Mystic Blue)
3rd Cryptic BCG, all 3 have been flawless. Finish is amazing, slick as hell, and it just looks good ;). Ryan on 4th Dec 2019
The bronze coating looks amazing. Unfortunately I haven’t tested the BCG yet, but looking forward to that. Will on 28th Nov 2019
This item shipped very fast and customer service was great. The BCG looked exactly as pictured and you can really tell a difference between it and other BCG's. This one was for my wifes AR but I will be ordering another one for mine very soon. Travis on 4th Nov 2019
As I noted other people saying, this bcg is absolute perfection. I am still waiting for the scope to arrive but hopefully in the next few days I will see how well it operates. It's probably the high point of my latest build. I topped it off with a POF tomahawk and love the feel. Brian on 14th Oct 2019
Haven’t been able to take it out yet, but this is easily the highest quality BCG I have ever purchased as far as fit and finish. Scott on 14th Oct 2019
I just had my first experience with Cryptic, it was great, I got the part sooner than I expected, the packaging was very nice, and the bcg I ordered was even nicer. The part works and looks great, I will be doing a lot more business with these guys. Aaron Savage on 26th Sep 2019
It's a toolcraft bolt. Beats out my bcm and my standard bcg by miles. I need to do a comparison with my lantac bolt but so far its held up to everything. Easy to clean easy to polish and it adds that bit of X-factor to my build that makes it more unique. Will definitely buy more. Jake S. on 12th Aug 2019
Flawless polish on all components. Haven't installed it yet but it's gonna be hard for dirt to stick to this. Looking forward to using such an excellent product. Unknown on 9th Aug 2019
I think you put out an excellent bolt carrier group, but I am exceptionally pleased with the way you do business. Lewis Graves on 1st Aug 2019
Simply Awesome! Worth every penny. Will be buying more. KdubW on 22nd Jul 2019