Me and my buddy have been talking about wishing we could use ar-15's for hunting varmints only. They must be like the line of ar's remington is offering with a 5 shot mag. No sks or mac90's, m4 ar's etc. Just ar-15 varmint rifles. I have a hard time understanding why they are not allowed but no caliber restrictions for deer or varmints...well that i have seen anyways. What do you guys think about ar's for varmint in pa in areas legal for centerfire rifles?