So I bought this magazine catch a few years ago. When using AE 5.7 ammmunition, after each shot, my magazine would eject itself. Since I hardly shoot PS90, I never narrowed down the culprit of the reason until I had more ammo stored. One day I decided to test SBR’ed PS90 with both FN SS197 and AE 5.7 and found out that both brand of ammunition would eject the magazine; it did not matter if the gun was suppressed or not. A user on Reddit suggested that the Man Kave magazine release was the issue because he had the same problems that went away when he swapped back to the factory release. I swapped mine back and my issues disappeared. I guess I either had a bad one that was out of spec. The build quality and design is nice though.
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BullPup Armory - the place for all things Bullpup
July 12, 2019
Reviewer:
Eric Berman from Palmdale, CA United States
Whether its my Tavor's or my PS90's, BullPup Armory has come thru time and time again. The Man Kave Extended Mag Release is simple to install (just follow the video) and really represents a great improvement over the FN mag release. My wife and I both have this release installed in our PS90's.
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Great experience
December 10, 2018
Reviewer:
KCG from Crestline, CA United States
Found this item, which I couldn't find in any gun store and the package arrived right on time. Keep up the good work!
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December 5, 2018
Reviewer:
Anonymous American next door from United States
I dont leave reviews but the quality of these products deserve nothing less than a 5 out of 5 Stars.
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Quality magazine release!!
November 16, 2018
Reviewer:
Don Wolf from Hurst, TX United States
Very nice quality aluminum!! I'm glad I finally purchased one for my PS90!!
Ejects the magazine after each shot 
BullPup Armory - the place for all things Bullpup