The receiver is a four digit meaning 1964 production and the sporter was not shipped until Dec 1965 and having a beginning serial # of 43908 according to Workman's book.
He believed that lower numbered guns were from some owners wishing to upgrade their carbine by buying a sporter stock from the factory thus explaining any SP stocks with a serial number lower than 43908. I sent for a letter anyway

QUESTION.... Does anyone have a catalog or price list showing the sporter stock by it's self available from the factory?
Workman states the SP gun was $10 more than the carbine.
Anyways, a few pics. The stock is much lighter than other 10-22's I have from the same era.
All thoughts and comments are expected!!
Cheers,
JAY