Reminds me of the Q-ships of WWII...
Neat system but it needs some improvement... i.e. some sort of stored energy (spring, hydo, electric, etc.) to deploy it... right now I'm counting roughly four actions to bring it into play: left door, right door, raise gun, prepare to shoot... it would be better for the operator to actuate one control with drives the system to open the doors & raise the gun while he focuses on preparing to fire...
(just one engineer's opinion)