One-piece, free-float tube lets you mount the optics, lasers and
foregrips your mission requires, without putting accuracy-robbing
stress on the barrel. Four, Picatinny rails, machined as a part of
the tube, provide additional strength and support. Vent slots
prevent heat buildup. Furnished with a separate barrel nut for
accurate indexing. Carbine fits CAR-15.
SPECS: 6000 series aluminum, anodized, black, matte finish.
2-3/8" diameter, fits barrels up to 1" in diameter. Carbine - 6¾" (17.1cm) long.
Catalog page 38