Outer Barrel OB-015 PreviousOB-014 NextOB-016 OB-015 OB-015 $0.00 Add To Cart Facebook0 Twitter Pinterest0 Keymod System Outer Barrel-Long520mm LengthMetal You Might Also Like OB-001 $0.00 OB-006 $0.00 OB-013 $0.00 OB-010 $0.00 OB-009 $0.00