ZM-4 Standard Flat-Top Carbine
.223 Rem./5.56 NATO cal., GIO, 16 in. chrome moly M4 barrel w/A2 flash hider, detachable mag., Mil-Spec forged lower and A3 flat-top upper receiver, forged front sight base w/bayonet lug, M4 handguard w/heat shield, 6-pos. collapsible M4 st...