M16 Conversion. Never fired except for testing. All new components on a registered lower receiver. The left side of the magazine well has the raised rib around the magazine catch and is marked “CAL..223-5.56mm/ MOD.J15/E.A. The lower was originally registered by Special Weapons. This is a fully transferable M16 incoming on a form 4. We will eFile as soon as the paperwork is approved.