SIG Sauer's MCX Virtus Rattler Canebrake. All parts can be removed and animated. One single material with 2K textures and three color variations. About 20K tris, including the sights. Game ready from any perspective, intended for use in FPS games. Get it for Unity: https://assetstore.unity.com/packages/3d/props/guns/fps-weapon-mcx-177248.
This rifle took about a week to make. I had always wanted to model it and felt like I finally had enough skills to do so. It's not perfect, but I'm pretty happy with the result. Made some changes to my modeling workflow, which turned out well. I'm thinking about making a shotgun or a revolver next and maybe doing a timelapse for YouTube.
If you have any feedback or thoughts about this, feel free to leave them in the comments. Cheers.