Anything? Well...

22lr
22mag
223
308, in bolt-action, M60, and Mk24
30-06 in a WW2-BAR
7mm-08
7mmRemMag
50 BMG, no Rifle that shoots the round, but an actual BMG!
A Mk19 and plenty of grenades
4 pound naval coastal battery gun
M61A1 Vulcan and 5 truckloads of 20mm

That oughta do it...