Check out Beretta GLX 160 Grenade Launcher 3D model on CGTrader for $39. High-quality Subdivision ready mesh by Polygate: 43965 polys, 44117 vertices.
OBJ (OBJ, filesize: 974 KB), C4D (Cinema 4D, filesize: 846 KB), FBX (Autodesk FBX, filesize: 1.88 MB), BLEND (Blender, filesize: 1.2 MB), 3DS (3D Studio, filesize: 674 KB), MAX (Autodesk 3ds Max, filesize: 6.98 MB), MA (Autodesk Maya, filesize: 1.42 MB), MEL (Maya Mel Script, filesize: 1.42 MB)