sentences:  However, seen the lack on the Type CQ assault rifle of a quick-attachment/detachment design hand guard as instead present on the American M16A2 assault rifle and M4 carbine, the installation of an underbarrel grenade launcher on the Type CQ assault rifle requires partial replacement of the handguard.Also known as the CQ 311-1 or the CQ M311-1, this rifle is the civilian version of the above-mentioned Military model.Nothing changes from the select-fire version, except that the CQ M311-1 rifle is not capable of fully automatic fire, and that the most recently manufactured models shift from the distinctive Type CQ curved pistol grip and hooded front sight to more standard parts, similar to the ones found on other AR-15 rifles.