i recently ordered extractor parts for my remington model 550. i was surprised the parts guy had parts for my 65 year old .22lr rifle. i put the parts in yesterday, i found the spring was twice as long as needed, the plunger was from a nylon 66 and needed to be modified, and the extractor was close enough that i could use it. not being a gun smith, i would have appreciated a note from the supplier telling me the supplied parts were in need of modifications. Is it normal to be sent parts for older guns that are only close?