[@User] semi-[b][i]Automatic[/i][/b]. the m14 model is a battle rifle, the m21 and m25 are sniper variants, and there were m14s that had full auto firing modes, but with the size of the caliber it uses they were too uncontrollable and most were set to permanent semi-auto.

now if you wanted an m21 for long range that'd be fine, it's essentially the same rifle with a few tweaks and a fixed scope.