I understand the functioning and according to that i will suggest not to have the LCD screen on the gun and if you want to have one then please do check out the Nokia 6100 type LCD that is color and can aid you in other stuff too, if your gun is big (something like AK or M) then LCD would look good on it as it also has place to get mounted try to mount it on side with LCD facing you so you can have the stats always visible while Aiming then you can also insert in functions like infrared camera on the gun and showing stuff in LCD at night.Pretty cool i think