The P2000 is a short recoil-operated locked breech pistol with a modified Browning-type linkless cam action with a vertically tilting barrel also employed in the USP series of self-loading pistols, as well as most modern linkless semi autos.
The cold hammer forged barrel has a polygonal profile while the slide is made from a solid bar of nitro-carburized steel. Following recent trends in modern pistol designs, the P2000 makes extensive use of impact-resistant polymers to reduce weight and production costs.
As with other recent HK pistol designs, the P2000 is modular to suit individual needs. For instance, the grip is modular with exchangable backstraps to adjust to individual grips, allowing the user to customize the pistol's grip size. There is an interface for accessories built into the frame in front of the trigger guard; the universal accessory rail on the dust cover that allows for the use of tactical lights, laser pointers, and other accessories. Attachment is positive and does not require any tools. This is in contrast to the USP series, which uses a proprietary HK mounting rail that limits the types of accessories that could be used with the pistol.