Baikal (Russia) made a combo 12 gauge / 223. They occasionally show up on Gunbroker for reasonable prices. I had a 12 / 6.5 Swede Baikal for a while that was very accurate and overall an apparently well made rifle with nice wood, for the money. Sold that one and now have a 12/ 223 that is still NIB. My intent is to use it for turkey hunting where coyotes sometimes respond to my call.
I had one in 12ga 3" and 7X57R that I scoped. The triggers were awful, but with trigger discipline it shot 5 shots into 1.5" at 100 yards. Good quality airgun 13mm mount bases work on them.
