Compatible with most standard M4 handguards, the GG&G AR-15 Under Foregrip Rifle-Length Picatinny Rail Mount is an easy-to-install rail mount, built around a proprietary cam system for stability under heavy recoil. Durable 6061-T6 billet aluminum alloy construction offers incredible strength and durability in a lightweight package, and the Mil-Spec anodized finish protects against rust and other corrosion. 12 mounting recoil cross slots offer ample attachment space for aftermarket foregrips, bipods, lights, lasers, and other tactical accessories. If that's not enough, this ultrareliable Picatinny rail mount is backed by a lifetime warranty. Includes all installation hardware. No permanent modification to handguards required. Made in USA.