ST Kinetics Ultimax 100, Singapore light machine gun in semi-auto civilian configuration. 5.56 NATO with 20-inch barrel. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 100 Year introduced: 1982, Singapore Weight: 10.5 oz Overall length: 40.5" Status: Active Military use: Yes Intended use: Military, Collector