Precision machined with maximum strength. Four mil-spec Picatinny rails for versatile accessory applications. Simple and friendly installation, no gunsmith or tool required. Solid locking features for most secure fit. Ultimate tactical solution to enhance accuracy under toughest environments. Fits CAR length model 4,15,16 and variants. Hard anodized finish for wear resistance. UTG rubber rail guard included for great comfort and protection. Made in the USA.