Colt AR-15 Sporter SP1 .223 Rem Pre-Ban (1974), 20-inch Chrome-Lined Pencil Barrel, A1 Configuration
This 1974 Colt AR-15 Sporter Model SP1 (R6000) is a pre-ban rifle that retains its original A1 configuration and features. It has a 20-inch lightweight, chrome-lined pencil barrel marked "C MP B," a slabside lower receiver, and an A1 upper with a fixed carry handle, no forward assist, and no brass deflector. It retains both the bayonet lug and the A1 birdcage flash suppressor, and comes with two USGI-style magazines and an OD web sling.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in solid functional shape. There are scratches and blemishes present. The bore is clean and shiny. Light pitting is present.
What's Included
- 1x 20-round USGI-style straight metal magazine
- 1x 30-round USGI-style curved metal magazine with taped lower body and pull loop
- OD web sling (installed)
The SP1 configuration showcases a fixed carry handle A1 upper receiver with no forward assist and no brass deflector, with the dust cover present. It uses a direct impingement gas system with a rotating multi-lug bolt and a bright/chrome-finished bolt carrier. The slabside lower receiver has no magazine-release fence, consistent with early SP1 production.
The 20-inch lightweight pencil barrel features a chrome-lined bore and a threaded muzzle fitted with an A1-style birdcage flash suppressor and lock washer. The barrel is marked "C MP B," and the twist rate is 1:12. An early flat slip ring and a front sling swivel riveted under the front sight base are present.
Sighting is via A1 iron sights, with an elevation-adjustable front post and a windage-adjustable rear aperture. Furniture includes a fixed A1-type stock with a trapdoor buttplate, an A1 checkered pistol grip, and rifle-length polymer handguards. The length of pull is 13.0 inches.
Receivers are aluminum alloy with a hard-anodized black finish, paired with black polymer furniture. The rifle retains its bayonet lug, and it was manufactured in the United States in the 1970s. It is pre-ban (1974) and part of Colt’s Sporter series, with an SP-prefix serial range consistent with early SP1 rifles.