BUMP Act - Summary & Key Points

1. Bans Devices That Turn Semi-Automatic Guns Into Machineguns

The BUMP Act makes it illegal to import, sell, make, or possess any device that increases a gun’s rate of fire to mimic a machinegun.
This includes bump stocks, switches (auto-sears), triggers, and electronic devices designed to make a gun fire rapidly.

2. Stops Illegal Modifications

The bill prohibits any modification to a semi-automatic firearm that allows it to fire like a machinegun or dramatically speeds up its rate of fire.

3. Requires Registration of Previously Modified Guns

If someone already owns a semi-automatic firearm that was illegally modified before this law takes effect, they must register it with ATF within 120 days, similar to how machineguns are regulated today.

4. Allows No New Sales After 120 Days

After the 120-day grace period, new possession, sale, or transfer of these devices or modified firearms becomes illegal for civilians.

5. Exempts Law Enforcement and Authorized Government Use

The law excludes use or possession by:

• Federal agencies

• State and Tribal law enforcement

• Government security organizations

6. Closes a Dangerous Loophole

By explicitly including modified semi-automatic guns in the National Firearms Act, the bill ensures that machinegun conversions can no longer slip through gaps in current law.