Honestly, I'd rather carry a bullpup configuration on the modern battlefield. Combat has become increasingly an urban short-medium range affair and trying to swing around a huge M-16 inside of a humvee is a hell of a lot harder than bringing an AUG or Einfled or SAR-21 to bear on an enemy.
You can have the best ammunition and have 5x better accuracy than your oponenet, but if your enemy can get off 5 shots before your barrel levels at him. You're dead.
There is a Ruger MKII 22/45, Springfield Armory 1911A1 Mil-Spec., Beretta 92FS, and a Glock 23C.
There are four other pistols on the list.
Luger P08 Parabellum
Ruger Single Action Army
As for Rifles. That's simple.
Winchester 1894 Lever Action
Shotguns is even easier.
Benelli M4 Shotgun
Those Germans make good stuff, same with Mr John M. Browning. Also you Italians make one fine pistol and Shotgun. Beretta hasn't been around for that long for nothing. (It's the oldest gun company in the World.)