Airsoft97 show their GHK CO2 GBBs Super Accura Custom which are accurate. These GBBs feature a customized SUPER ACCURA interior and an exclusive GHK-Hiei Kai inner barrel, minimizing flyers for a more consistent and enjoyable shooting experience, even for beginners. The initial velocity is adjusted to remain within legal limits even after magazine heating, ensuring safe operation. While one cartridge can fire a full magazine and a few extra shots, declining gas pressure in the latter half may affect bullet speed and hop-up performance. For optimal performance, they recommend replacing the cartridge after each magazine.