Replacement Magazine Gas Fill Valve for VFC Elite Force Spartan Licensed GLOCK G17/G19 Gen.3 Blowback Training Pistols

"slapped this bad boy in my glock 19x mag, no complaints here. i now have 3 fully functional mags as opposed to two. good day

"I just tested these on my faulty glock 17 gen 4 Green Gas mag and works and fits like a charm, and in case someone is woondering, the gen 4 mags are compatible with the Glock 17 gen 5 and Glock 18c gen 3, they run no problems in both replicas, and this product works in both type of mags.

"This valve works well on my Elite Force Glock Gen4 with VFC gas system.
Note VFC and KWC are two separate system thus the Elite Force Gen4 GLock and Gen3 Glock and the non-blowback Glocks are 3 different system and not compatible. I am guessing the previous reviewer assumed all Glock use the same valve which is not the case. The listing does specifically state that the valve is for Spartan Gen4, and Elite Force Gen3 which is accurate at this very moment. (Will they release both Gen 4 and Gen 3 in blowbakc, non blowback, half blowback in the future only time will tell)