I've had several 10-22s over the years, but have kept only two. This international model has been the recipient of a match-grade trigger, a modified pull-back bolt release and an easier mag release. It was a special high-grade production item for a large distributor. Accurate, too! That's a 10-shot 25-yard group, rapid fire from a bench.
This one is my knock-about "tacticool" item with a folding stock, muzzle brake, a pull-back bolt release, and larger mag release lever.
I think the 10-22s deserve "classic" status and devoted a chapter to them in my book
101 Classic Firearms.
John