Bolt assembly for M-15/M-16 or M-4 machined from Mil-Spec Carpenter No. 158® steel, shot peened for increased strength per Mil-Spec, includes Mil-Spec 8620 tool steel extractor w/ viton insert and improved design spring that dose not require an o-ring, Mil-Spec ejector and spring.
HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected)
Complete Mil-Spec Bolt includes:
Shipped super fast. Even coating with zero defects. Fits in the barrel extension of my 357AR perfectly with no trimming required and no additional headspacing necessary. Will recommend to others and purchase again. Johnny on 10th May 2018
The fit and finish is beautiful, customer service was great ! I have not shot my rifle yet because it's freezing in Chicago, highly recommend this product if u want the best bolt and guts for your rifle ! Brian on 20th Dec 2016
This is the best product and company I have done business with in a long time. They respect their customers they have a great warranty that they truly stand behind and if you need to email them to get more information they are always quick to respond and on top of it. I work in a gun store and recommend their products highly and have had co-worker order from them as well ( he was very impressed with his NiB BCG ) and also now highly recommends them to put customers trying to finish their builds or just as an upgrade to the standard BCGs. Love this company and their product. Joe on 12th Oct 2016
Finish looks good but no time to try it out yet. I will use it to replace semi bolt on my lot. Keep the lot bcc as a spare for my rifles. Shopped in a timely manner without problems. Unknown on 22nd Feb 2016
This Coating is superior to any other. Besides the coating the owner is always making sure the parts he uses are only the best, if he finds any issues he wont sell them. The other thing about buying this product is the customer service, I have Ordered other pars from many other popular companies and have been in the resale business for over 20 years and no one has impressed me like the owners with Cryptic Coatings. I enjoy speaking with them every time and they take care of their customers. Leonard Aguina, California. on 11th Aug 2015
I had ordered a bolt carrier group in the mystic bronze and was extremely pleased with it. It wasn't until after I had that installed I realized I wanted the bolt and cam pin to go with it. They didn't have an online option to coat just the bolt. I got ahold of Cryptic Coatings to see what they could do and it was in the mail shortly after. Very happy with everything. Fit and finish is perfect! Definitely will buy from Cryptic Coatings again. Alec Bunfill on 5th Jun 2015
This is the nicest AR bolt I have ever dealt with. The tolerances are superb. I wish I had known about cryptic coatings when I first started my build. The customer service is first rate. My only regret is not getting my complete BCG from here. But my next build will run a full cryptic coatings BCG. Thank y'all. Matthew Mills on 8th Mar 2015