Assault Rifle: AK-47: Cheap gun, mags, and ammo (more powerful and cheaper than .223). A good one can shoot 3" or less groups at 100 yards, plus a classic wooden on elooks oh so sexy!
6.5 Grendel Ar-15 (preferably piston driven): AR accuracy, AK reliability and punch, with .308 range. A piston driven one cost a preety penny, though.
Sniper Rifle: M-107 A1: It's a fifty, nuff' said.
Cheytac M-200: With match ammo and a good shooter, can consistently hit a man size target at 3,000 yards (300 yards farther than the world's longest confirmed kill). I also heard it was more powerful than a .50, but that's probably bunk.
Pistol: Beretta M92 .40: Fits my hand perfectly and shoots the caliber I'm best with. Just needs a laser sight.
Blades: Kukri: Uhh... it looks cool?
Knuckle Duster: Designed to stab through steel helmets and looks bass to the ass. What's not to love?