Okay. I hope this is not dumb. I have not thought it through deeply or looked stuff up, it just occurred to me and I figured someone here would know, out of all you experts on all things AR. 1. Am I correct to assume AR-15 pistols are legal in CA with the usual bullet button, 10 rd cap etc? I'm assuming it 'cos I have seen guys at the range with them. 2. Am I also correct to assume that the AR-15 pistol has a buffer tube that will accept an AR type stock, or can be fitted with a rifle buffer tube/stock ***'y? 3. So............could one own an AR-15 pistol and keep it legal......but if the S ever HTF then conceivably one could fit a rifle buttstock/buffer and have a short barrel CQB type entry gun.......yeah? Also, if yes on 1. & 2. is it legal to build out a pistol, from parts like you would a rifle.....just using a 14.5" barrel or 10" or whatever length you choose? I emphasized pistol because the build would be legal under the CA law and requirements. If I am wrong, can you explain what special features an AR pistol has that disables it from being a rifle? I am not.....repeat NOT........suggesting any illegal behavior at all. Not for me and not for anyone else or the website. It is just a curiosity I have and besides, if things ever got that bad that the average law abiding citizen has to defend himself and family, loved ones etc against a mass populace out of control.....then regular law enforcement has failed and I do not think they will be going around looking for law abiding folks who have made their weapons as effective as possible for home defense etc.