Remington 550-1, .22 short, long & long rifle cal. semi-auto rifle.  Serial #NSN.  Excellent condition.  24" barrel has an excellent bore, correct open sights, 98% blue.  Receiver has 98% blue.  Walnut stock has excellent smooth finish.  Remington marked black checkered plastic butt plate.  Tube fed magazine.  Action works fine.  Very nice quality autoloader!   C&R OK.