The DPMS free floating quad rail features 4 picatinny rails for mounting accessories. This handguard is constructed of aircraft aluminum with a mil-spec hard coat anodized finish. This handguard is designed to match the High-Profile LR-308 receivers, which are generally the slick-side uppers. It will also work with low profile receivers, but the top rail height will not match. The quad rail uses an included barrel nut to attach to the upper and a lock ring secures the handguard in place. An LR-308 barrel nut wrench and receiver block is required for installation.
The DPMS High-Profile receiver will measure 3/16" thick from the top of the receiver rail to the charging handle cut out.
This rail will work with a low-profile receiver, but the top rail of the handguard will not match the height of the receiver rail.
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