The Accucam QD System for the EOTech XPS Series is a scaled down version of the Accucam QD System (NSN: 1240-99-696-3341) that GG&G provides to civilian, law enforcement and military users for use with EOTech 512 and 552 optics. The patented GG&G Accucam QD Mounting System is still the only QD lever system available today that does not add height to the EOTech optics, while maintaining proper cheek weld and fast co-witnessing.Features : System not recommended for .50 BMG or lightweight machine guns Manganese phosphate matte black finish Solid billet 4140 steel