Outer Barrel OB-002 PreviousOB-001 NextOB-003 OB-002 OB-002 $0.00 Add To Cart Facebook0 Twitter Pinterest0 M4 Standard Outer Barrel375mm LengthMetal You Might Also Like OB-006 $0.00 OB-016 $0.00 OB-012 $0.00 OB-001 $0.00 OB-019 $0.00