From Tokyo Marui, a long type magazine for the 1911 series gas blowback pistol. With a 40 round capacity it beats the normal magazine by more than a dozen shots and the larger gas reservoir ensures more reliable shot-to-shot FPS consistency with less sensitivity to pressure and temperature changes. The long mag is available in silver and black versions.
Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.