It doesn't meet the legal definition of a rifle. It's the binary fire control. What remains to be seen is if it uses their regular BFSIII unit or a different one, that when not on binary setting, fires 1 round on the release of the trigger.
It all comes from Technology Branch allowing the binary trigger in the first place.
18 U.S.C., § 921(A)(7) and
27 CFR § 478.11
The term
“Rifle” means a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of the explosive in a fixed metallic cartridge to fire only a
single projectile through a rifled bore for
each single pull of the trigger.
Pull & release to fire = not a rifle.