This is a high-polygon model of a Gewehr 98 type rifle. The model is about 400,000 triangles, meant for set dressing or decoration in a wide range of scenes.
The model provided comes with high-resolution 4096x4096 textures, created and exported from Substance Painter, and made specifically for the model. Textures for diffuse color, OpenGL normals, height, metallic values, and roughness are included as .png. The Blender model (for 2.79 ideally) includes Cycles materials with textures packed into the .blend file. The Blender 2.8 file includes both Cycles and Eevee materials, also with packed textures.
For other programs, you would ideally import the model as .FBX or .OBJ, then use the included textures (diffuse color, OpenGL normals, height, metallic values, and roughness) as inputs for an Uber shader or Principled shader, attaching each texture to the appropriate input, then adjusting the roughness texture values to your liking.
Be aware, this is a visual representation only, and is not necessarily proportionally correct or accurate to measurements of a similar rifle. Also be aware the model is not animation ready, and parts like the bolt are neither rigged for animation nor meant to move. All modeling and texture work is original.
Thank you and good day!