Can I Bring CO2 Cartridge for Life Vest on a Plane to United States?

According to TSA guidelines, you may bring a life vest with up to two CO2 cartridges inside, plus two spare cartridges in your carry-on or checked bag. Even if an item is generally permitted, it may be subject to additional screening or not allowed through the checkpoint if it triggers an alarm during the screening process, appears to have been tampered with, or poses other security concerns. The final decision rests with TSA on whether to allow any items on the plane. You may not transport CO2 cartridges without the associated lifejacket.