Outer Barrel OB-017 PreviousOB-016 NextOB-018 OB-017 OB-017 $0.00 Add To Cart Facebook0 Twitter Pinterest0 Keymod System Outer Barrel-Short410mm LengthMetal You Might Also Like OB-002 $0.00 OB-012 $0.00 OB-010 $0.00 OB-019 $0.00 OB-014 $0.00