9mm rounds.
almost every kind of 7.62x39mm
Lincoln's Repeater uses .44 Magnum ammo.
.45 ACP
Take it to a gunsmith for verification.
You need to have it examined by a gunsmith to be sure.
Yes I have a bunch of airsoft gun's and i have used ammo that is the wrong size... and i clogged the gun and had to take it apart to get it out.
100-400 or so
BB's or a single shot .177 caliber pellet.
Standard 16 gauge shotgun shells.
It depends on what kind of ammo.
the m16 uses 5.56 caliber ammo
You need to submit the kind of firearm is it? Pistol, rifle, shotgun?