Blaster Cannon Turret by KaranaK.deviantart.com on @DeviantArt
3d guns turret
The Scimitar is the standard light defense turret of the UEF. With its formidable accuracy and high caliber, it has proven to be highly effective at both anti-missile and anti-fighter roles. Full N...
HMS King George V in 1945, secondary QF 5.25 inch gun turret. (wikipedia.image) 01.17
Defense Gun Turret (Multiple Designs)
Officers and crew of battleship Idaho posed on the after deck and after 14-in gun turrets, circa 1938; note SOC-3 Seagull floatplanes of Observation Squadron Three atop Turret #3 catapult and on deck
Battleship 16" gun turret
Smuggler Gun Turret reverse angle, Chuk Wojtkiewicz on ArtStation at http://www.artstation.com/artwork/smuggler-gun-turret-reverse-angle