Manticore transformer rail 13" gen ii black for ar-15 FEATURES:-Includes rail, barrel nut, barrel nut wrench & 6 polymer grip panels-AR-15 Aluminum Free Float rail system w/ ability to intermix Keymod, M-LOK & polymer grip panels-8 QD sling swivel pockets-three on each side & two underneath-13" Length Other Features: M-lok and keymod-on the same rail, m-lok and keymod panels sold seperatly-6 mounting locations on the rail eight qd swivel pockets, ships with barrel nut, barrel nut wrench, and 6 polymer grip panels, made in usa