sentences:  It can be distinguished from other AR-15 and M-16 pattern rifles by its long, revolver-like pistol grip, somewhat rounded handguards, and the unique shape of its stock.The CQ was first introduced in the early 1980s.This weapon is chambered for 5.56×45mm NATO cartridges and did not enter service in large numbers with the People's Liberation Army, apparently having been intended for export sales.