? Professional grade one piece design? Simple installation, includes all tools? Mil-spec top rail? Extremely lightweight design, weighs only 4.8 oz with hardware? Slim 1.6 inch diameter for a great feel? Features 15 full and 5 half M-LOK slots? One five slot M-LOK™ compatible rail included? Features two anti-rotation QD sling swivel sockets? Constructed of 6061 aluminum, hard coat anodized for a lifetime of service? 100% Made in the U.S.A., 922R Compliant? MI Lifetime Warranty? Patent pending M-LOK™ is a trademark of Magpul Industries Corp