This Mossberg manufactured receiver & barrel assembly is for the model 151M semi-auto rimfire rifle and is in very good condition exhibiting a mixture of thinning original blue finish with a brown patina. The receiver is the only part on the model 151M 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)