Verified answer

Ask at your local gun dealers. If they have such guns in stock, or can order them, you're good.

Mossberg 37202

No, the Chiapa can not be converted to fire 5.56/.223. CMMG and Spike's Tactical both manufacture .22lr chambered rifles which use a standard "Mil Spec" style lower receiver. You can take a CMMG M422 or Spike's ST-22 .22lr rifle and swap out the upper receiver with any standard "Mil Spec" receiver based upper such as a .223, .300 AAC blackout, etc.

It is just a 715 with a bunch of plastic crap on it. It obviously is not an AR-15. I don't see why it would be illegal. Check with a local dealer and see if they have one or can get it.