Both the boxlock and sidelock are good reliable guns ,although I would avoid the single trigger. I have no worries in recommending AyA's . Only 2 things to watch for if its a used or older gun is that the bites are sound and that it not loose in the action and that the strikers are Ok if a sidelock,not a big problems to put right if you know a competant gunsmith. Depends on your build but the sidelock seems a heavier gun .