German "defense" after the defeat in the 1st world war: production of the MG13 machine gun

MG 131 Machine Gun Unfolded - German Military Scales Maschinengewehr 131 Cal. 13mm Luftwaffe WWII WW2 1/30 1/35 1/48 1/56 1/72 1/76 1/87 - Etsy UK

1940年-1945年まで生産されたラインメタル社の口径13mmの航空機関銃　MG131機関銃とは : Gun Geek

http://www.patreon.com/ForgottenWeapons Cool Forgotten Weapons merch! http://shop.bbtv.com/collections/forgotten-weapons The MG13 was an interim machine gun used by the German military in the 1930s until the MG34 was adopted and widely issued. The MG13 (so designated to allow a claim that it was a WW1 era design, not a new development by Rheinmetall in the 1920s) was a closed-bolt, magazine fed, short recoil, hammer fired design. It has a particularly interesting mechanism allowing the recoil sp