KY HB315

Defines and prohibits "assault weapons," including semiautomatic rifles, shotguns, and pistols with specific features such as detachable magazines, folding stocks, pistol grips, or threaded barrels; possession is a Class D felony

Bans machine guns and bump stocks, with possession classified as a Class C felony; defines bump stocks as devices that increase a semiautomatic rifle's rate of fire using recoil energy

Exempts military personnel, law enforcement officers, licensed firearms dealers servicing weapons for exempt parties, and those possessing machine guns registered under the National Firearms Act for research purposes

Allows individuals who lawfully possessed assault weapons before the effective date to keep them at their residence, business, shooting ranges, or approved firearms exhibitions, and permits transfer to family members

Creates a certificate of possession program through Kentucky State Police allowing current lawful owners to apply within one year for documentation proving pre-ban ownership as an affirmative defense