The AKM includes a barrel that has a chrome-lined bore and 4 appropriate-hand grooves at a 240 mm (one in nine.45 in) or 31.5 calibers rifling twist amount. The forward barrel trunnion provides a non-threaded socket for that barrel and a transverse hole for the pin that secures the barrel https://g3-22211.blog-kids.com/29721248/fascination-about-holosun-hs403b