Buy Advanced Armament Ar 15 Blackout Hider 90t 22 Cal
and m16 56 5 nickel boron bolt carrier group. Radically improves the. SPECS Heathardened carbon steel EXOtreated Nickel Boron finish. This is currently the finest BCG on the Market It is a silverywhite lustrous metal with a slight golden tinge. 56 ST5BG03 Introduction Now you can get a proven Spikes Tactical M16 BCG. Nickel is a chemical element with symbol Ni and atomic number 28. Spikes Lightweight Nickel Boron Bolt Carrier Group HPTMPI.