This valve fits the KWA M11A1 NS2 model magazine. If your Mac 11 mag is leaking gas from the top valve, this part is the ideal replacement. KWA M11A1 part 105.
This valve will not fit other KWA gas pistol models.
All KWA parts are top-quality replacement or repair parts, and are the only parts recommended for use with KWA Gas Blowback Pistols.