One of the two alternative default guns for Counter-terrorists in Counter-Strike: Global Offensive, the other alternative being the P2000. It costs $200 and comes with a detachable silencer.
Comparable to the difference between the M4A1-S and the M4A4, the USP and the P2000 are nearly identical except for a few important factors. The USP reigns supreme in accuracy with a more manageable recoil, and it also has the added benefit of a silencer which removes tracers and silences gunfire. The P2000 gets 1 extra bullet in its magazine and over twice the spare ammunition, and it also has the superior accuracte range(31>29). The accuracy of the USP decreases if the silencer is removed. All other stats such as damage and fire rate are the same.