Rail mounted guns

Garberiel 800 Lumens Compact Rail Mount Weaponlight Pistol Light Gun Light Weapon Light Tactical Flashlight with 2 Modes for Glock Ruger Springfield M&P SD Sig Sauer : Sports & Outdoors

1200 Lumens Rail Mounted Compact Pistol Light LED Strobe Tactical Gun – MKAirsoft

The U.S. Military Used to Operate Railroad-Mounted Superguns

LaserLyte Gun Sight Trainer Universal Rail Mount (UTA-FSL)

Railway gun hi-res stock photography and images - Alamy

X40K, Tactical Gun rail mount

Rifle-Mounted Death Star - Streamlight ProTac 2.0 Review

Railway Guns British and German Guns at War

AR-15 Rifle Mount For Vehicles, Truck SUV, Cars

BL 18-inch railway howitzer - Wikipedia