I shot a Mk 10 for years at Sporting And Ducks .
It was a great Gun and never gave one single problem , I shots thousands of rounds through it .
The Mk 10 is a improvement over the Mk 70 in my opinion, better shaped stock , trigger adjustable for lenght of pull , from memory they had longer chokes than the Mk70 and was heavier which isn’t a bad thing when shooting 100 target matches.
Bookmarks