here is one for sale... seems the guy does have 10 rd post ban mags after all.. I dont believe all 5.7 ammo is AP so a civie MIGHT be a possiblity since their is not .gov law againt it.. just a comp policy..
dont think the round is classified a rifle rd ,, hell the p90 is a subgun not a rifke... and I havent seen anything esle that takes this rd..
http://www.subguns.com/classifieds/i...uery=retrieval