This Remington manufactured bolt sub-assembly is for the model 550 semi-auto rimfire rifle and is in very good condition with light wear. This sub-assembly consists of the bolt, left and right extractor, both extractor springs and both extractor plungers.  (file photos)

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