Remington Model 550-1, .22 short, long & long rifle cal. auto-loading rifle.  NSN.  Good condition, mfg. 1932.  24” barrel has excellent bore.  Barrel and receiver have 50% original blue, crisp markings.  Receiver has been drilled and tapped for side mount base.  Stock has very good glossy re-finish.  Tube fed magazine.  Action works fine.  C&R OK.