Where do you get the ak-47 in Metal Gear Solid 2 sons of liberty

This actually isn't an ak-47, it's an AK-74U. And how do you get it? Simple. go to strut F, on the ground floor, go in the room on the north side of the room. The AK should be in there. And if you want the M4, it's in strut F as well but be carefull, the room is protected by semtex and laser trap.