Yes, they both fit, but not 100%, there is a slight change in the frame structure, as I've tried it on my USP as well..The box <Bianchi) said USP/P2000 I passed on it, due to it not fitting my requirments..
Looking at both a USPc and P2000, they are close in size, etc. If you're using a holster that is not molded specifically to one or the other, you should be okay. It will fit, but not a secure fit. My recommendation is a holster, of whatever material, molded specifically for the gun.
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