This Remington manufactured early variation outer magazine tube with the simple oval shaped loading port is for the early model 512 Sportmaster bolt action rimfire rifle and is in very good condition exhibiting a mixture of original blue finish with a brown patina and containing some scattered specks of rust. (file photos)

NOTE: Remington model 512 rimfire rifles with the following year/serial number have been observed with this part:  NSN (KK) May 1941, (XK) December 1941, (CL) April 1942 &  (APP) March 1945