You can the models from here :
Pistol V.7
Sci fi Grenade launcher
Sci-Fi Grenade launcher and Pistol Ready for games
Rigg and Animations and Collision including
There's 6 Texture Type :
1-BaseColor
2-Roughness
3-Metallic
4-Normal
5-AO
6-Emissive
Feel free to rate it up if you like it .
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