Fits Benelli M4 and Clone Shotguns Allows mounting of Aimpoint T1, T2, H1, H2 and clones Lower 1/3 co-witness, which allows use of standard iron sights through red dot Provides a super clean OEM look Constructed from 6061 aluminum, hard coat anodized for a lifetime of service. Includes optic mounting screws. REUSES factory M4 rail screws, or 2x Benelli screw part number 143990A and 2x Washer 1439610A.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }