Joined
·
3,173 Posts
The P30, HK45, and USP all utilize recoil operated modified Browning type actions with recoil buffers. Aside from that the P30 and HK45 have interchangable grip panels, backstraps, and also has a standard picatinny rail. The USP does not have a modular grip and has a non-standard rail that requires the use of an adapter for use with standard lights/lasers (like what would fit on a Glock).