Sell CQB rear quasi M4CQBR metal triangle machine sight j8 Jinming 9 Xinweier M4a1 modified accessories mk18 outdoor entertai best price

Feature: This Detachable Rear Sight will mount on all Picatinny / Weaver Style rails. Features Dual Peep Apertures. Sight is Fully Adjustable for both Windage & Elevation. • Detachable Rear Iron Back-Up Sight (Dual aperture) • Precision Made – Adjustable for Windage and Elevation • Mounts onto Weaver & Picatinny type rails • Aluminum & Steel Construction