Check out Steiner DBAL-I2 Green or Red visible and IR laser aiming device Low-poly 3D model on CGTrader for $15. High-quality mesh by ParallaxGameStudios: 20769 polys, 10641 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 4.18 MB), FBX (Autodesk FBX, filesize: 3.5 MB), SPP (Substance Painter, filesize: 748 MB), PNG (PNG, filesize: 323 MB)