This Remington manufactured late variation receiver with scope mounting groove is for the model 550-1 semi-auto rimfire rifle and is in very good condition exhibiting a mixture of thinning original blue finish with a brownish gray patina having light wear and possibly a few specks of light surface rust. The receiver is the only part on the model 550-1 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 photos)

Note: Model 550-1 rimfire rifles with the following date codes and years of manufacture have been observed with this part: (CA) April 54, (LB) Feb. 55, (WB) Aug. 55, (XD) Dec. 57 & (DS) Sept. 69.