DPMS 4 Rail Low Free Float Tube for the Panther .308, Standard Length A3 Height

4 Rail Low Free Float Tube for the Panther .308, Standard length, A3 height The .308 cal. version of the 4-rail free float tube features a solid one-piece free float tube made from 6066-T6 aircraft aluminum. The picatinny style rails are integrally machined into the free float tube. Two rail heights are available, one for the A3-style upper receiver and the other for the original LR-308 upper receiver. Each rail height is available in two lengths, standard and carbine. The free float tubes are vented and hard coat anodized per mil spec and are matte black in color. Overall width dimension is 2.1" only slightly wider than the AR free float tubes, and include a manganese phosphated steel locking collar to control the timing of the rails.