Reno May Opinion about this trigger legalities in CA. (YES I know CA and NY don’t have the same laws due to it being worded differently.) In California their definition of semi automatic is “a firearm functionally able to fire a single cartridge, eject the empty case, and reload the chamber each time the trigger is pulled and released.”
In NY for those who do know on NYS website Section 21 states that our wording of semi auto is “any repeating rifle, shotgun or pistol,
regardless of barrel or overall length, which utilizes a portion of the
energy of a firing cartridge or shell to extract the fired cartridge
case or spent shell and chamber the next round, and which requires a
separate pull of the trigger to fire each cartridge or shell.
The Kunvirt Fire Control Group converts your semiautomatic AR-15 to a single shot firearm. Once Kunvirted, your AR-15 cannot be classified as an assault weapon. Might be a gimmick or might be useful to some people who wants to check it out.