Nickel Boron coated complete BCG with 5.45x39 bolt. Spikes stopped making these many years ago. Used in 16” and 9.5” 5.45x39 uppers from BA. Works perfectly. Last picture to show seal on gas rings. Shot very few round through them, have been in storage for more than 10 years. Also willing to sell the bolt only for $40 since it will fit in any 5.56 carrier you have.
412-841-6925