OPERATOR’S MANUAL. SUBMACHINE GUN, 5.56-MM PORT FIRING, M231
See: OPERATOR’S MANUAL. SUBMACHINE GUN, 5.56-MM: PORT FIRING, M231 http://www.liberatedmanuals.com/TM-9-1005-309-23-and-P.pdf
laststandonzombieisland
Weapons, Wars, Preparation and Security from a recovering gun nut turned bad writer
Thanks for sharing and I’m glad it’s still up after all these years!