Package contains one game-ready HK USP 9 pistol which is saved in three formats. First one is standard FBX file, second OBJ and third is Unity package so you can simply import it into game engine. Preview images were rendered in setup imitating game engine, so results are quite similar to those which you may achieve in game.
Pistol is made of dark plastic and metal. Safety lever, trigger, magazine, silde etc. (see preview image) are separated from main object so you can create animation for those like load and shoot. There is also one 9mm cardridge in magazine that can be removed or multiplied to fit your scene. Model has dimensions similar to real weapon.
Textures folder contains color, normal, roughness and metallicness but also ambient occlusion texture so you can easly set up your material in game engine. Texture size is 2048x2048. Feel free to scale these down.