i have a couple of questions on a ar pistol build , looking online im seeing that a pistol is to be no longer than 26" , id like to run 11.5" barrel and a maxim defense brace , best of my calculations it should be under this 26" measurment coulapsed and a one website said it should be measered minus brake, question , is this 26" measured coulapsed of extened , extended will push measurement over the 26" , i see online some of the big ar producing companys listing pistols with oal specs 26.5 up to close to 30" with brace as well , according to one article i read this would then be an aow and not a pistol guessing would stil be ok to have but would it require any special registering even though it has a brace , second question again another article said to be a pistol lower needed to be marked pistol but all the picture i see are on regular ar lowers no pistol markings, any info or advise would be appreciated , i want to buy once buy right and buy leagal , thanks