This is exactly the biggest reasons for me wanting to have a USPc(with a stainless slide of course dammit!) as my next purchase. It is smaller than the HK45c but will still use the full size HK45 mags. Perfect for a CCW. I already have a butt load of HK45 mags so I can save a bunch of money by not having to purchase mags for the USPc.It doesn't look too pretty, but yes, it'll work.