This is a game ready asset that I did to study materials as part of a mentorship with Ethan Hiley. The goal was to create super realistic textures with all the video game limitations. 

The gun itself is around 60k tris and it has 3 texture page with different sizes. The biggest texture is for the receiver of the gun which is 2k,the others are 1k each. There is a separate texture page for the bag. 

The model was done in fusion 360 and retopo in Maya and textured in Substance Painter. Some edge damage was added on zbrush and the bag fabric was done in Marvelous designer. And it is rendered in Marmoset 4. I hope you like it