https://trackbill.com/bill/massachusetts-house-bill-4303-an-act-to-stop-mass-shootings/2173046/
H4303 | Massachusetts 2021-2022 | An Act to stop mass shootings - Legislative Tracking |...
Massachusetts H4303 2021-2022 By Representatives Decker of Cambridge and Moran of Lawrence a petition subject to Joint Rule 12 of Marjorie C Decker Frank A...
stop mass shootingsact
https://www.minnpost.com/state-government/2025/10/mass-shootings-plummeted-during-a-federal-assault-weapons-ban-would-a-minnesota-ban-have-a-similar-effect/
Would an assault weapons ban stop mass shootings in Minnesota? - MinnPost
Oct 27, 2025 - Assault weapons are used in most mass shootings, but the effectiveness of a state ban is not quite as clear.
assault weapons banstop mass