The 52mm Carbon Fiber Tri-Rail is an accessory mounting system with unparalleled stability and versatility in an incredibly lightweight package. Its capabilities are only possible due to the application of aerospace grade materials and manufacturing processes. Weighing in at an amazing 1.95 oz. (56 grams), without sacrificing any strength, it provides the versatility to be adapted to any shooting situation from bench to field thanks to the use of the M-Lok system. From picatinny to swiss-arca, flashlights to sling swivels the choice is yours. The carbon fiber clamping body measures under .7mm in thickness ensuring it will not put upward pressure on your barrel even on the Challenger Pro and Zeus models. ***Only compatible with airguns utilizing a 52mm air tube*** Material Clamp Body - Aerospace grade carbon fiber Clamping base components - hard anodized 6061-T6 aluminum Features Rock Solid attachment to Air Tube Low Profile Design M-Lok slots at 3, 6, and 9 O'clock positions providing limitless options for accessory attachments Lightweight - 1.95 Ounces (56 grams) Flat surfaces at 3, 6, and 9 O'clock -Provides flat stable faces for use with saddle mounts Options Available Add On - 5 Slot Picatinny Rail with QD sling mount. Hard anodized 6061-T6 Aluminum