b'Suppressor Ready RailsGriffin Armament M-LOK compatible Suppressor Ready Rails allow up to 1.5 outside diameter silencers to be mounted inside the octagonal M-LOK rail. This provides suppressor aficionados a sleek, and compact overall length to AR15 type firearms. These new rails features a close tolerance,1 heavy-duty, 7075 aluminum, T6, type 3 hard coat anodized finish. The barrel nut can be easily installed to 35-85 ft/lbs using the included Griffin Armorers Wrench.The new slip fit clamp design is extremely user friendly and does not require any shims or special timing methods. The clamp geometry in the rear section of the rail is low profile and ergonomically pleasing even for long durations of extended carry at static security positions.195'