This Remington manufactured inner magazine tube assembly is for the model 550-1 semi-auto rimfire rifle and is in very good condition with light wear. The brass tube has a light tarnish. (file photos)

Note: Model 550-1 rimfire rifles with the following date codes and years of manufacture have been observed with this part: (KUU) May 1949, (DUU) Sept 49, (EUU) Oct. 49, (CWW) Apr. 50, (EWW) October 1950, (LXX) February 1951, (WXX) August 1951, (LYY) February 1952, (RYY) Nov. 52, (PZZ) June 53, (LB) Feb. 55, (WB) Aug. 55 & (XD) Dec. 1957.