Takes a bit of work, thinking about & shopping around, but I managed to convert my Hog Hunter to a 10-speed for well under $300

Accurate Mag bottom metal & magazine $205
Take-off non accustock from eBay $44

Half an hour dicking around with a milling bit because the stock is for a bottom bolt release.....et voila.




This would've been a great budget build....had I not dropped & yes, smashed, the scope.