COLT Sp1

GeneralManufacturer: Colt's Manufacturing Company Model: AR-15 SP1 ("Sporter") Type: Semi-automatic rifle Production: ~1964-1985 DimensionsBarrel length: 21.5-22 inches Overall length: ~38 inches Weight: ~6.3-6.8 lbs (lightweight build) Chambering & OperationCaliber: .223 Remington (early rifles not always marked for 5.56 NATO) Gas system: Direct impingement Twist rate: 1:12 (optimized for 55gr bullets like M193) Barrel & UpperBarrel profile: Pencil (thin/lightweight) Flash hider: Early: 3-prong Later: A1 "birdcage" Upper receiver: "Slick-side" (no forward assist) No brass deflector Furniture & ControlsStock: Fixed A1-style Handguards: Triangular (early), later round Grip: A1 pattern SightsFront: Fixed post Rear: Carry-handle adjustable aperture MagazineType: Detachable box magazine Capacity: 20-round standard (accepts 30-round mags) Key Identifiers of an SP1No forward assist Slab-side lower (no magazine fence on early models) Lightweight "pencil" barrel Classic Vietnam-era styling(1)20 Rnd Metal Magmay show signs of previous use such as hairline scratches, dings, dents, all cosmetic on none which could affect the function of this item.