I built an AR Pistol with a 11.5 barrel, my understanding if it's total length is 26' or longer I can use it like a rifle and ATF does not consider it
![How to Properly Measure Barrel Length Presented by Larry Potterfield | MidwayUSA Gunsmithing - YouTube How to Properly Measure Barrel Length Presented by Larry Potterfield | MidwayUSA Gunsmithing - YouTube](https://i.ytimg.com/vi/_v5c_p1Uju0/maxresdefault.jpg)
How to Properly Measure Barrel Length Presented by Larry Potterfield | MidwayUSA Gunsmithing - YouTube
![Twitter 上的GIFFORDS:"The Boulder gunman bought an AR-15 pistol days before opening fire. An AR-15 pistol looks like an AR-15 rifle and shoots rounds like one too. But in the eyes of Twitter 上的GIFFORDS:"The Boulder gunman bought an AR-15 pistol days before opening fire. An AR-15 pistol looks like an AR-15 rifle and shoots rounds like one too. But in the eyes of](https://pbs.twimg.com/media/ExVUN__XEAAtVxU.png:large)