I have one that I have never shotThe 22TCM is a necked down .223 cartridge. Great round for small game, although I don’t hunt. What I do know is it’s a flamethrower and out of a 16” barrel you can take full advantage of its 2200+ fps velocity.
I’ve been trying to track down one of the rifles for awhile. RIA/Armscor is the only mfg,and not every one Carrys them