Unity Tactical FAST Comp Series Mount 2.26" Optical Height CompM4/CompM4s Footprint Anodized Finish Black COMB. It is the perfect mount for the standard issue U.S. Army M68 CCO series. It will also accept legacy Comp and Comp-style sights in Aimpoint s 30mm Top Ring Mount such as the Patrol Rifle Optic (PRO) and Aimpoint Carbine Optic (ACO). It comes standard with a two cross bolt rail clamp but is compatible with the FAST QD Lever. FAST is a series of optic mounting solutions that provides end users with a quicker sight picture than standard height mounts. FAST mounts position most optics at a 2.26 optical centerline from the rail which allows for more rapid visual processing of the battlefield by ensuring an ergonomically correct heads-up posture. Further they provide faster and easier dot/reticle acquisition while wearing night vision goggles protective masks plate carriers and other gear. COMPATIBILITY: DIRECT: Aimpoint CompM4 Aimpoint CompM4s WITH AIMPOINT 30MM TOP RING (Aimpoint Part Number 12194): Aimpoint PRO Aimpoint ACO Aimpoint CompM3 Aimpoint CompML3 Aimpoint CompM2 Aimpoint CompML2 MOUNT TYPE: 2 Cross Bolt Rail Clamp FAST QD Lever Compatible (Sold Separately) Specifications for Unity Tactical FAST Comp Series Mount: Manufacturer: Unity Tactical Condition: New Color: Black Fabric/Material: 7075-T6 Aluminum Quantity: 1 Finish: Anodized Additional Features: Aimpoint CompM4/CompM4s Weight: 3.5 oz Package Contents: Unity Tactical FAST Comp Series Mount