3-sided Rail Tactical Accessory Sight Tube Clamp

Length: 65mm (2.6 inch) Diameter: 17.6mm (0.7 inch) Weight (net): 100g (3.5 ounce) High-durability aluminum alloy in black matt and beautiful complement Made in China under our strict quality control Install on barrel Bottom and two side 21mm picatinny rails High quality aluminum alloy in durable black matte finish Shock proof can be used on real fire .223Rem caliber M series With four pieces of half rounds (metal) adapters, one pair for installation and the other is for spare Designed for Real Fire Caliber, Full Metal,Complete with 2 Sets of Barrel Adaptors for