Making the G3 (1970)

Narration is in German, but you will understand the vid anyway

The origin of this rifle can be traced back to the final years of World War II when Mauser engineers at the Light Weapon Development Group (Abteilung 37) at Oberndorf am Neckar designed the MKb Ger"at 06 (Maschinenkarabiner Ger"at 06 or "machine carbine device 06") prototype assault rifle chambered for the intermediate 7.92x33mm Kurz cartridge, first with the Ger"at 06 model using a roller-locked short recoil mechanism originally adapted from the MG 42 machine gun but with a fixed barrel and conventional gas-actuated piston rod.[3] The Ger"at 06 would later be adopted as the StG 44 (Sturmgewehr 44 or assault rifle). It was realized that with careful attention to the mechanical ratios, the gas system could be omitted.[4] The resultant weapon, the Ger"at 06H (the "H" suffix is an abbreviation for halbverriegelt or "half-locked") was assigned the designation StG 45(M) (Sturmgewehr 45(M) or assault rifle) but was not produced in any significant numbers and the war ended before the first production rifles were completed.