I own a C9 model and, while it's not going to win any beauty contests, it goes "bang" every time I pull the trigger. Seems pretty damned accurate too. Certainly a good HD starting point.
That "bang" initiates the "blowback" action that ejects the spent round and chambers a fresh round. Repeat until magazine is empty and slide locks back. Replace magazine and repeat......
btw.....I didn't have to do any tweaking of the mag lips on my Hi-Point. I made sure the gun mags were lubed up before the first outing and it's been fine. Two hundred rounds through it with not one FTF or FTE using both the stock 8 round mag and the optional 10 round mag.
