Today I bought a brand New c9. I have noticed that when the slide is pulled back and cocked the springs make a terrible grinding/crunching noise and also when uncocked the firing pin drops back and forth and moves freely. I haven't fired it yet and not sure if I should. I have 2 other pistols but they are quite different (kel tec p11, beretta 96) Something just doesn't seem right. When I remove the slide and inspect the springs and firing pin they seem to be in good shape. I would have a hard time believing that the firing pin is supposed to move back and forth like this. Any help is appreciated thanks in advance.