$3 Double Barrel Derringer 3D model by darkcaper3d. Available on CGTrader with 14568 polys and 14803 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 5.9 MB), OBJ (OBJ, filesize: 3.56 MB), FBX (Autodesk FBX, filesize: 1.06 MB), DAE (Collada, filesize: 7.36 MB)