Given a 16" barrel (total length including any flash thingy) and a stock that will reach a 12" or better Pull when extended. How short can an AR-15 be? And I am not talking about the legal 26" min for a rifle. I know all about that. I want to know what can be achieved trying to get it to 26" I'm looking for a Willys Jeep Gun I have room for a rifle with stock collapsed not more then 34" long. I would use a repop M1A1 (paratroop M1 Carbine) but they are just to expensive) So I am checking on other options.