Compatible with Benelli M4 and clones - Allows mounting of Aimpoint T1 T2 H1 H2 and clones - Lower 1/3 co-witness which allows the use of standard iron sights through a red dot - Provides a super clean OEM look - Weight: 1.4 oz - Constructed from Hard Coat Anodized 6061 Aluminum 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 - 100% Made in the USA with a lifetime warranty