Coated bolt carrier with Key (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. Bolt carrier 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.
Mil-Spec M-16 Bolt Carrier and Key HPT:
I had a problem with vertical stringing in 308 build and switched out carrier with cryptic carrier. Completely fixed problem, great finish even on basic manganese phosphate, and very well built. Shipped fast and great customer care. I will use cryptic from now on. Greg on 5th May 2016
Just received my nickel boron carrier. First class product. Very slick coating and well made. Will be buying more for future build projects. Would definitely recommend. Charles on 20th Apr 2016
Just received my carrier. It comes well packaged. The carrier is flawless. It looks and feels great. Would definitely recommend it. Very nice kit wouls recommend it. Fast shipping and handling. Scott on 18th Mar 2016
Glad I found these guys, little bit of research pays off. Will be using these for all of my future builds. I just got the basic magpho coating, but the finish is even on the whole bolt carrier with no tool marks of any sort. Money well spent. Unknown on 1st Mar 2016
So much to say about Cryptic Coating BC. I got the mystic silver and was very pleased with this product, it simply would not stay in my hand cause how slick and smooth it is. I think of this product as jewelry for an AR. The build quality is well done and it's worth spending the money for a Cryptic BCG. I just hope that Cryptic Coating can have the light weight Titanium BC in there coating. Conrado Galan on 30th Mar 2015
Just finishing up my .308 build with your Mystic Black bolt carrier. I went with high-end barrel kit from JP, Timney trigger, Vortex Viper LR optics... so I figured that I should invest in a bcg that would be easy to clean (and look at!). Looking forward to getting to the range with it. Bob- Howell, MI on 30th Dec 2014