Sorry for taking a whole day to respond. Ok so to narrow some things down. I built it the way I have it now simply because it was 100% within my current arduino ability.
Yes infact the gun is hardwired to my glove at the time it makes connection. Though its a pretty weak connection so I dont have to forcibly unplug or plug things in when pulling out the gun. If you need to imagine something for what it looks like, look at the hands of like gundam models or something, the plug the mechs use to communicate with the electronics in their weapons is where I originally got the idea.
Also to clear something up. The screen I have now isn't on the wrist really, more of on my forearm facing sideways (if I stretch my arm out). Reason I said I'd mount a screen on the side of my gun. The Steyr AUG is a pretty big gun, and its the type where the firing action is back behind where you hold it, so I don't have a view of the screen on the arm when I'm using my rifle.
The current LCD screen I'm using because its what I had on hand, eventual plan was to grab one of those nokia ones, learn to work with them, then use that instead, maybe have it feed data from my friends guns at the same time if I switch to bluetooth or wifi (though I haven't played with them yet, kinda short on the cash at the moment).
Thing is though, I can't use RFID because then I couldnt get info on remaining ammo or mags from the gun (which was the original point) or at least I can't with what I know now. Bluetooth is what I'm going to look into to continue the project sometime next week (after paycheck day.)
For right now though what I'm doing is that I'm using a sparkfun 6pin polarized connector to get the info from the gun itself.
1pin is 5Vin, 1 is gnd, 1 is the trigger button's NO contact, one is the magazine slots NO contact. Then the way its working now is the 2 remaining pins, each gun I'm planning on building a voltage divider into, and depending on the analog output of that VD, itll tell teh arduino what gun I'm using, and call for its info to the screen.
Sorry for the wall of text thats out of order. Kinda typing this at random spots when I get a chance to.