This rail changes an already great looking tactical gun into a jaw dropping beast! More importantly, it opens up the possibilities with the latest airgun trends. From the top rail mounted bipod by GRS to inline night optics, and everything in between. Features Integrated bubble level in the rear allowing you to quickly check to make sure your gun is level. A must have for long range shooting. M-Lok slots allowing you to attach varied accessories such as; flashlight, laser and weights. It has a built in 20 MOA, giving your scope more elevation for long range shooting. Has a Delrin shroud clamp to prevent shroud drooping. It minimizes or eliminates any point of impact changes when switching suppressors. Available in standard and compact sizes with black anodize. Weight = 1 lb Extends past the gun block 12.5 inches For a 600mm barrel, pair it up with this adapter to allow the shroud to pass the rail.