Original sentence: states had laws banning high-capacity magazines, limiting the number of rounds to 10 or 15
Edited sentence: states formed legislation, establishing laws banning  high-capacity magazines holding under 20 to 30 rounds, identifying them as “high capacity” despite the first semi-automatic rifle, the Girandoni Rifle of 1778 possessing an initial 20-21 rounds, (later 30 round) detachable magazine, and the industry standard of 20 or 30 rounds issued with rifle purchases, per the first magazine created for the AR rifle