Trijicon RMR Mount for ACOG w/Bosses. 5x 4x and 5.5x ACOG (Advanced Combat Optical Gunsight) models w/boss. These Red Dot Sight Mounts include a mount four mount screws and two RMR screws. Specifications for Trijicon RMR Mount for ACOG Scopes with bosses: Manufacturer: Trijicon Color: Black Finish: Matte Fabric/Material: Metal Fit: All Trijicon RMR's not included Red Dot Sights-Footprint: RMR Optic Cut: Not Applicable Condition: New Additional Features: RMR Mount for all 3.5x35 4x32 and 5.5x50 ACOG Models w/ Bosses Package Contents: Trijicon Mount for RMR Sight and ACOG Scope with bosses RM 35 Trijicon RM35: NEW RMR Mount for ACOG w/ bosses