I recently decided to add 2 weapons to my collection. I want to add a SBR AR-15 and SBR AK-47 How do I do this? I don't really want to purchase a SBR as they are pretty fing expensive the AR-15 i like is going to run 1700 dollars if I purchase it from a dealer in Houston. 1400 for gun 200 for stamp, 100 for them haveing to mess with NFA paperwork. I dont own a AR-15 already but if I did, How would I go about adding a 10.5 " barrel to it. Lets assume I have a complete AR-15 upper and lower. I think ( if my memory serves ) all I would have to do is form 1 the Lower and have it engraved after paper work was approved then install the barrel. Yes? or No? Same for the AK-47 although I do already own an Ak-47 so I wouldnt have to purchase anything except a new barrel I think. Thank you for any help I searched ARFCOM for 2 hours and still havent found anything relating to this.