No. The M14 rifle fires the 7.62 NATO rifle cartridge. It is not a shotgun.

No, the M14 is not a sniper rifle, but a battle rifle. However, the M21 Sniper Weapon System, which has match grade ammunition, sights, and action, is derived from the M14. Today, the M14 is used by American armed forces as a designated marksman rifle.

M14 was standard issue military rifle before m16.

M14

The M14 rifle continues to see service in all branches of the military, as well as several foreign militaries. It is not, however, the standard service rifle of any.