Introduced in 1979 with very few imported to the United States. Standard sights with a ported muzzle brake and flip-up grenade sight. Stamped and welded upper receiver with the standard FN/Herstal and import markings on the left side with a spring loaded dust cover on the right side. "S/1" marked trigger group on the lower receiver. Combination vented metal and ribbed plastic handguard, sling mounts, two position gas regulator, smooth plastic pistol grip, and folding tubular buttstock