The AKM provides a barrel that has a chrome-lined bore and 4 right-hand grooves at a 240 mm (1 in nine.forty five in) or 31.5 calibers rifling twist price. The ahead barrel trunnion contains a non-threaded socket to the barrel and a transverse gap for the pin that secures the barrel in position. The AKM's barrel is put in while in the ahead trunni… Read More