The H&K MG4 is a 5.56mm light machine gun adopted by Germany, Spain, and Portugal. It features an open-bolt, rotating bolt, and gas-piston operation with a quick-change barrel system that allows removal regardless of bolt position. The fire control is limited to safe and full-auto, and it utilizes a proven belt-feed mechanism derived from older H&K designs.
Firearm expert Jonathan Ferguson provides an in-depth look at the extremely rare Steyr-Solothurn S3-200. He details its design as a German loophole to bypass WWI arms restrictions, its role as a precursor to the General Purpose Machine Gun (GPMG) due to its belt-feed mechanism, and its unique 'rocking trigger' and short recoil operation. The S3-200, serial number two, highlights significant developments in automatic weapon design.
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