Firearms
The H&K USP .40, the only firearm you'll ever need.
More accurate than I am, the sound of the action is extremely pleasing, and it won't Glock on you.
But if that's not enough...
There's always the Springfield SAR8 and Bushmaster XM15. If your USP doesn't do the trick, these will.
Pesky silhouette target bothering you at 400 yards? No problem. Just pick it off with the scoped HK91 clone.
Steel plate got you down at 75 yards? No problem for the Bushmaster.
Ammunition
I wish the government would hurry up and stop fighting illegal wars so I can buy ammo at sane prices again.
Reach out and touch some paper.

