XM21 CBR (CARBON FIBER BATTLE RIFLE)
.308 Win. cal., GIO, Garand style action, 16 1/4 or 18 1/2 in. NM barrel, AG composite CBR stock with Mil-Spec buffer tube, 6-pos. telescoping M4 style buttstock, pistol grip, Mil-Spec 1913 Picatinny rails at 3, 6, and 9 o'clock positions, ...