Ollie Talks Airsoft got the Guns Modify Mag Catch for the Marui MWS. He talks about it in this video if it is something he recommend to MWS owners to get... "So this comes as no surprise that the Guns Modify Mag Catch is superiour to the Angry Gun version, but Im also looking at their Geissele version too!"
Pheas Airsoft got another guide for you, especially if you are an owner of a Double Eagle UTR45 AEG as he shows how to do a mag catch changer over... "In this video I show you how to swap between the 2 included mag catches that come with the Double Eagle UTR45 SMG.
Come and take a look at how easy it is!"
Laylax got available a custom magazine catch for the Tokyo Marui Desert Eagle .50AE Gas Blowback Series from their Nineball brand... "A magazine catch that can be attached to the Tokyo Marui Gas Blowback Desert Eagle .50AE series. Manufactured by lightweight, high-precision machined aluminum, it ensures reliable magazine release and retention.
Designed by Zoddy and manufactured by Laylax is the Custom P90 Magazine Catch. Designed for the Tokyo Marui P90 AEG, this allows you to change magazines smoothly whilst wearing a glove by increasing the size of the protuding parts on both sides. You can change magazines faster in a CQB game with the U-shaped bar on top of the main body and pulling the magazine catch. Video below shows how to install it on your P90.