COLT SP1 Rifle with 603 Upper & Scope .223...
SN: SP65332. Made in 1976 with a 20-inch pencil barrel equipped with a birdcage flash suppressor. This COLT SP1 has been paired with a USGI M16A1 (Model 603) "tear drop" forward assist upper with Cerro Forge markings that is attached to the lower by use of an offset forward take-down pin. Since this is an SP1, the rifle has a "slabside" 602-type lower receiver that is equipped with a Type E...