I think Armalite makes these. Pros and cons? Seems that if your purpose is varmints or medium game, not defense, this is superior/more versatile to .223, esp. at longer ranges or in windy conditions, with the heavier 6mm bullets. Thoughts/experiences on parts, etc? Hey, if you're shooting varmints, then fun is the name of the game, not food - and what's more fun than a semi-auto AR? And how would equally accurized .243 and .223 ARs compare in accuracy?