Can a serialized receiver be registered as a .50 BMG rifle?
A fully functional, serialized receiver which does not already fall within the statutory definitions of a machine gun or an assault weapon and is lawfully possessed prior to January 1, 2005, may be registered as a .50 BMG rifle during the statutorily authorized registration period. Please note that make, model, and serial number information are required for registering .50 BMG rifles or receivers.
