Amazon.com : Red Laser Sight for Picatinny Rail, Compact Laser Sight Fit for Pistol and Airsoft, Mounted on 20 mm / 11 mm Picatinny & Weaver Rail (Red) : Sports & Outdoors
Barska GLX Red Laser with Built-In Mount and Rail AU11406 B&H
BEAMSHOT M1 Mount for 0.75 inch Diameter Laser Sight