I remember during the Clinton ban that there were pump action ak47 on the market. And i think there were some straight pull ar15 also.I know it's not as popular as an AR but with the seeming Renaissance of bolt actions and more and more getting back into them, seems someone would make a somewhat basic upper/bolt combo to build up. I see Uintah or whatever sells complete uppers...but man they seem kinda expensive for what it is and you're stuck with their limited selection. Sure seems for around $200 it would be viable for a bolt/upper combo to finish out with barrel, furniture and etc of your choice.