CORE Steel Anti-Reversal Latch for Ver 2/3 Gearbox

CORE Steel Anti-Reversal Latch for Ver 2/3 Gearbox
-Can suitable for AEG Ver 2 and Ver 3 Gear Box
http://airsoft.tiger111hk.com/p22084/CORE-Steel-Anti-Reersal-Latch-for-Ver-2/3-Gearbox/product_info.html