Precision machined with maximum strength Four mil-spec Picatinny rails for versatile accessory applications Simple and friendly installation, no gunsmith or tool required Integral assembly alignment front tabs and spinal cords to guarantee perfect rock solid fit Ultimate tactical solution to enhance accuracy under toughest environments 12" long top & bottom covers 27 slots on each side of Picatinny/Weaver quad rail Fits rifle length Model 4, 15/16 and variants Hard anodized finish for wear resistance 20 pieces of UTG rubber rail guards included for great comfort and protection