the gun is a beretta 92FS
it is the stainless steel version of the sidearm used by the US Military, (except for the Navy SEALS, they put about 800 rounds of ammo thru their sidearm every week and found that they need a tougher gun) it holds 15 9mm rounds
also the large hole in the slide is made so you can use enemy ammo (instead of using their clip, pull your slide back and push the round into the chamber, when you release the slide it will be loaded)