Assault weapons have now been defined as all nearly all semi-automatic weapons including pistols in a proposed bill with nearly 200 (198 as in text of bill) cosponsors so far (majority is 218) in the House. Magazine restrictions are also included in the bill, safe storage, etc. are in--presently existing firearms are grandfathered in. The bill was introduced in Feb. but just now has the text posted.
https://thehill.com/homenews/house/457323-assault-weapons-ban-picks-up-steam-in-congress
Text of bill is here
https://www.congress.gov/bill/116th-congress/house-bill/1296/text?r=13&s=1
https://thehill.com/homenews/house/457323-assault-weapons-ban-picks-up-steam-in-congress
Text of bill is here
https://www.congress.gov/bill/116th-congress/house-bill/1296/text?r=13&s=1