mg34
The MG34 is a 7.92×57mm Mauser belt-fed machine gun used by Nazi Germany before and during World War II. Introduced in 1934, it was considered the first machine gun. It features a quick-change barrel, a tubular barrel shroud with circular perforation, a bipod, conical muzzle device and flip-up iron sights.
The MG34 was not suitable for quick mass production and costly. So it was supplanted by the MG42 despite both remained in service.