These AR-15 rifles have A1 lower receivers. The upper receivers on these SP-1 models have no Forward Assist, and no Expended Case Defector. They have built in carry handles with A1 style rear sights. The full size SP1 Sporter has a 20-inch barrel while the SP1 Carbine has a 16-inch barrel, both are 1:12 twist. The Carbine weighs 5.8-pounds (empty) and the Sporter weighs 7.5-pounds. These are interesting and lightweight AR15 variants. Finding unfired samples this old is a rare treat, and we were happy to get the chance to photograph them together
SP1 Sporter Rifle with triangular handguards and an SP1 Sporter Carbine with collapsible stock and ribbed short handguards
These are two early AR-15 rifles made by Colt between 1964 and 1985.
SP1 Sporter Rifle with triangular handguards and an SP1 Sporter Carbine with collapsible stock with ribbed short handguards