Professional grade one piece design – Simple installation includes all tools – Mil-spec top rail – Extremely lightweight design weighs only 2.6 oz with hardware – Slim 1.6 inch diameter for a great feel – Features nine full M-LOK slots – One five slot M-LOK™ compatible rail included – Constructed of 6061 aluminum hard coat anodized for a lifetime of service – 100% Made in the U.S.A. 922R Compliant – MI Lifetime Warranty