Mornin', ctw,....
Dovetails, PROPERLY cut and fitted up,...VERY, very strong.
looks at the wringing and beating that the under barrel mounted flat springs imposed on the big BPCRs of the mid to late 1800s,....Sharps, Winchester, Hepburn, etc.
A dovetail will be IDEAL for your application,...I'd settle for 44-40 "soft" Solder for the belt and suspenders approach,...if I didn't use that, I'd at least flood the joint with Loctite green,....to avoid it becoming a crud trap.
GTC
