This archive includes weapons from CS: GO - UMP45. The texture quality is normal, it has its own icon in the GTA SA style, and it has its own sound.
Authors: Undead099032, korchighin. The archive contains a video on how to replace weapon sounds, as well as a program for replacing them. P.S. Version 3.0 added UMP parameters. Replace in weapon.dat. Path to weapon.dat: "GTA San Andreas/data".