The Ameli is an automatic weapon that externally resembles the 7.92×57mm Mauser MG 42 machine gun of World War II but has more in common with the MG 45 and its post-war variant, the West German 7.62×51mm NATO MG 3. However, unlike the MG 42's roller-locked short recoil operating principle (where the barrel and bolt recoil together a short distance before unlocking), the Ameli uses the delayed blowback method of operation with a fixed barrel and a pair of rollers which retard the rearward movement of the bolt.[1] This mechanism was employed in CETME's Model A, B, C and Model L series of rifles, and also in the Heckler & Koch G3 battle rifle, HK33 assault rifle and MP5 series of submachine guns.