The first Colt SP-1 rifles used during Vietnam did not have a forward assist on the upper and were of the M16 style. This Bolt Carrier is of the same “Slickside” design with no forward assist notches on the side.
Specifications:
- SP-1 Slickside Design (No Forward Assist)
- AR15 and M16 Compatible
- 5.56 / 223
- 8620 Steel Carrier Nitride Coated
- 9310 Vac-Arc Steel Bolt Nitride Coated
- 4340 Steel Cam Pin Nitride Coated
- 4140 Steel Gas Key Nitride Coated
- Tool Steel Extractor Nitride Coated
- Shot Peened
- MPI (Magnetic Particle Inspected)
- HPT (High Pressure Tested)
- Gas key staked to Mil-Spec Standards
- Grade 8 Hardened Fasteners
- Extractor Insert with upgraded Crane O-Ring
- Power Spring Kit
- Bolt engraved with MPI/9310