That's why H&R won't do it, the barrel is too thin, some have epoxied a base on them tho. I think if I were going to do it, I'd drilled and tap one hole for a recoil lug, then JB Weld an H&R base on. Any gunsmith could do that for ya, or if you're the DIY type, you could do it too, wouldn't be that hard. Hardest part would be getting the hole perfectly in the center, and that wouldn't be too critical for a short range firearm like a turkey gun.
By recoil lug, I guess you're referring to a shallow screw for the purpose of keeping the momentum from the recoil causing the scope from moving, and eventually breaking loose. I guess this would need to be closer to the chamber opening, so as not to be where the highest pressures are. I'm very familiar with the use of a tap and die set, but I've never tried any gunsmith type work.
A forum community dedicated to the great outdoors and hunting enthusiasts. Come join the discussion about hunting, fishing, survival, archery gunsmithing, optics, reviews, accessories, classifieds, and more!