TROY TRX 13" ALPHA RAIL (NO SIGHTS) BLK (STRX-AL1-13BT-01) STRXAL113BT01

Machined aluminum free-float handguard employs a unique barrel nut and rotary-locking system to ensure proper alignment of top rail with receiver rail. Handguard slides over barrel and gas tube at an offset angle, until the notched barrel nut indexes in the internal grooved channel for a secure fit. Two hex head screws lock down the handguard, and a built-in stop prevents over tightening. Vent holes let heat escape the barrel and minimize weight. White alpha-numeric designators on the cross-slots ensure easy repeatability of accessory positions.  Streamlined Alpha models have a single, top Picatinny rail, deep horizontal grooves for a secure no-slip grip, and additional ventilation holes to reduce weight and dissipate heat. Come with three bolt-on rails for mounting additional accessories exactly where you need them. Alpha models fit standard factory AR-15/M16 barrel nut.