This 7" carbine-length round quad rail is a free-float handguard for mil-spec AR-15 rifles in .223, 5.56 and 300 BLK. It does not require a delta ring and ships with its own barrel nut, so the rail floats off the barrel instead of clamping to it.
The extended top Picatinny rail gives you more room for optics and backup sights, and the three remaining rails take lights, lasers and grips. The handguard is machined from T6 aircraft-grade aluminum and weighs 12 oz.
Specifications:
Included: barrel nut, slip ring, spacer and 2 hex wrenches.
Before you install: confirm your gas block fits under a 1.8" inside diameter and that your rifle uses a mil-spec upper. Torque the barrel nut to spec and check the rail alignment with the upper before you mount optics.