Gucci Mane -- Hand Over The Guns, NOW!

Gucci Mane's got a problem with the United States government that goes beyond taxes -- it's like a bullet to the heart ... because Uncle Sam wants to take his Glock.

According to a federal indictment, the government wants Mane to surrender his 2 guns -- a 40 caliber Glock and a 45 caliber Taurus. They also want the ammo that goes with it.

As for why the government has a hard-on for Mane ... the rapper has 2 priors -- aggravated assault with a deadly weapon and possession of more than 20 grams of pot.