I went today to buy an AR lower to start building myself my first AR. The problem is I want to build an AR pistol. I got told by the guy at Brightwater that he cannot sell me a lower if I am going to make a pistol because all of their lowers are registered as rifles. He says all dealers who follow the rules will tell me the same thing. How does a person go about building a pistol version of an AR if all the dealers have to register them when they receive them? I doubt they want to register any of their lowers as pistols since that would limit their appeal to buyers.