Description
Noveske bolt carrier group enhanced 5.56mm ar-15 nitride
FEATURES:
-Features 8620 steel w/ 158 Carpenter Steel bolt & 9310 tool steel extractor & cam pin
-Blacknitriding? is a thermal chemical diffusion of nitrogen & carbon into the surface of the steel
-This process increases wear-resistance, fatigue strength, corrosion resistance, lubricity & cosmetic
appeal
