Manufactured in Switzerland as a commercial semi-automatic version of the SIG SG 550 select-fire service rifle, imported for a limited window of time before the U.S. 1994 Assault Weapon Ban. Features hooded blade front and adjustable four-position drum rear sights with tritium night sight inserts, adjustable gas regulator, handguard integrated folding metal bipod, ambidextrous color-coded "S/1" marked fire controls, bayonet lug, and birdcage flash hider with integrated rifle grenade spigot. The "KW 19 2012" marked barrel bears the SIG Arms address, model, caliber, and EPS Imports mark. Matching "8151" serial numbers on the lower receiver, bolt carrier, and bolt. Fitted with green polymer ribbed and ventilated handguard, ribbed pistol grip, and smooth folding stock with ribbed rubber buttplate.