I can recommend the NEF Survivor in .410/45 Colt. It's a single shot break open that fires both .410 shells and .45 Colt cartridges, so it's probably a perfect compliment to your revolver. You can store some ammo in the fore end and butt stock too. I bought one about 25 years ago and still have it.

They were also sold under the H&R brand. I don't think either are made anymore, so you will have to go used.

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My sgntr is mor thn 30 chrctrs