This Mossberg manufactured barreled receiver is for the model 42M-B semi-auto rimfire rifle and is in good condition exhibiting a mixture of a brown patina with an older added coat of black paint. The receiver and barrel are both stamped "UNITED STATES PROPERTY SERIAL NO. 19511" and there are numerous British proof marks present. The receiver is the only part on the model 42M-B rifle that is tracked as a firearm therefore it will need to be transferred through a dealer. Receivers do not qualify as a C&R based on BATFE's guide lines. (file photo)