My firearms season always falls during a very busy time of year. I did get a buck, but was only able to hunt a couple days after that. The anterless portion wrapped up tonight, and I would like to get another deer. That leaves the alternative methods season later this month. Centerfire pistols are legal in this state. I'm sure where you can see where this is going. I have two ARs, a S&W MP15 that has been converted to 300 BLK, and a mostly Anderson lower/upper built with the old barrel from the MP15. If I bought a short barrel for 300 BLK, what else would I need to convert one of them into a pistol? Pistol gas system? As far as the lower is concerned, is it just a matter of removing the butt stock, or does a whole new buffer tube need to be installed? If that is the case, it would make sense to just build a whole pistol upper, and just slip off the butt stock on a lower whenever I want to use it.