but I'm just going to go ahead and say that there quite a few mods that have modern weaponry(aside from the fact that all weapons aside from the AR-2 and Gauss in HL2 are real but just suck pretty hard and aren't used), I can't name any specifics but if you just go to www.moddb.com or look through the Steam Store I'm sure you could find some.
thanks guys you have been great help i don`t know why all mods are about zombies and such ??!!! i got crappy computer that can`t run cod4 or bf2 but halflife2 works great on my pc .
It would be kind of silly to simply change the models of the guns in HL2 to realistic modern weapons. Unless you want your M4A1 to shoot crossbow bolts.
I heard SMOD has a whole bunch of real weapons, and cool features related to using them.