The Norinco M-77B and Norinco NP-20 handguns are export versions of the Norinco Type 77 pistol currently issued to the Peoples' Liberation Army of China and to Chinese law enforcement agencies. Built larger and heavier than the Type 77, both the M-77B and NP-20 are chambered for the popular and inexpensive 9mm luger round rather than the Type 77's 7.62x17mm Type 64 cartridge (which is unavailable outside China). These pistols employ a specially designed delayed blowback action which is similar in concept to the Heckler & Koch P7 PSP pistol. The Norinco 77B is notable for having a slide that can be racked using the trigger finger! This one is still in the box! fresh and minty . Dont find ones like this collector special !!!!