Several emergency room doctors who’ve treated victims in the aftermath of mass shootings are throwing their weight behind a Connecticut appeal attempting to hold gunmakers Remington and Bushmaster liable for the Sandy Hook school shooting.

In an amicus brief filed by Michael Dell of Kramer Levin on Tuesday, 10 doctors claimed the Bushmaster AR-15 semi-automatic rifle, used in the Sandy Hook, Aurora, Colorado, and San Bernardino, California, massacres is a weapon of war that must be kept out of civilian hands. Five of the doctors treated victims in those shootings.