I've got a 20 gauge Tracker ll barrel that I mounted on my receiver that has a thumbhole stock.
It's pretty light and easy to handle and is perfectly balanced for me.
I sold the 12 guage Tracker ll I had on my receiver first because I didn't like the rifle sights, and after I had fired a couple shots with it, I decided the recoil was just too much for me, and I thought recoil didn't bother me, so I was wrong.
Anyway figured the 20 wouldn't be much better, but after firing it I was pleasantly surprized, even though I had added a few ounces of shot into the stock, with the sling, and scope, the recoil I barely notice now, and plus I'm not carrying around a lot of weight like the USH would be.
Accuracy is a clover leaf at 50 and I haven't gone beyond that!