The AKM includes a barrel with a chrome-lined bore and 4 right-hand grooves at a 240 mm (1 in 9.forty five in) or 31.5 calibers rifling twist price. The forward barrel trunnion includes a non-threaded socket for that barrel plus a transverse gap for any pin that secures the barrel https://friedrichi320mzn3.national-wiki.com/user