Serial number GS010948. Made in 1991 with a 20-inch heavy barrel that has a bright bore with strong visible rifling. This pre-ban Model 6600K “Sporter Target Model” marked the beginning of the transition to the post-ban configuration AR-15A2s in so far as it has no bayonet lug. It is equipped with an A2 rear sight assembly, an A2 muzzle brake, a brass deflector, a forward assist device & a semi-automatic only bolt carrier but it still has an early large hole slab-sided profile receiver. Comes with a black webbed sling, cleaning kit in the buttstock & a COLT 20-round magazine that has been limited to 5-round capacity.