Daniel Defense has been building rifles for military and law enforcement customers for two decades, and its rail systems are a large part of that reputation. This is the DDM4 15.0-inch Picatinny rail, a free-floating handguard that mounts without touching the barrel, so nothing you attach to it changes point of impact.

Fifteen inches gives you nearly the full length of a carbine barrel for hand placement, lights, lasers, and bipods. It is machined from aluminum, hard-coat anodized, and built to the tolerances the company's duty contracts demand.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.