I've read about certain items that will "extend" the life of the parts in an AR. The one that has me the most concerned is the lower reciever since if an AWB does come into play, those are the pieces most likely to go bye bye and those that are pre ban, would skyrocket in price. One of the parts that I have read about are the KNS anti walk pins that supposedly prevent reciever wear in the pin holes. Are these the holes for the trigger housing?? What about the regular reciever pins? Are there any "special" or oversize pins that will prevent reciever wear to those holes? Or is this amount of precaution too much? I've heard some guys say that these special pins aren't necessary because I won't be shooting full auto. On the other hand, I've heard a few gunsmiths relate stories to me about AR's that had so much reciever wear that they couldn't even reliably fire anymore. It was an AR rental at a range that he was referring to. I know there's another thread going on about the direct impingement versus gas piston, but I'll ask here too. Is it true that a gas piston system will extend bolt life by keeping most of the carbon off of it? Also, will cleaning it often also preserve the life of the AR? I clean my pistols only every so often because it takes so long, but should I be "babying" my AR by cleaning it after EVERY shooting session? I know I don't do that with my pistols, I just make sure they're lubed. Just curious to see if any of you guys have any advice on preserving the life of the often maligned black rifles. Anything helps, especially with the prospect of an AR famine in the future. Thanks!