This Remington manufactured 24" long barrel is for the model 550 semi-auto rimfire rifle in 22 S, L & LR caliber and is in very good condition exhibiting a mixture of original blue finish with a brownish gray patina and possibly having a few specks of surface rust. The bore is bright and rates excellent. (file photo)

NOTE: Remington model 550 rimfire rifles with the following year/serial numbers have been observed with this part: NSN: (OL) July 1942 & (WL) August 1942