Atlas Custom Works Magazine Catch for AAP-01 Type 1, Black

The stock mag catch on a Tokyo Marui or Action Army AAP-01 works fine until you're in a reload drill and your thumb slips off the small button. Atlas Custom Works' Type 1 mag catch replaces that button with a larger, raised surface that gives you a positive contact point even with gloves on.

The body is machined from 7075 aluminum, the same alloy used for receiver sets and high-stress internals. It's not a cosmetic upgrade; it's a durability upgrade that also happens to feel better under the thumb. The finish is matte black, consistent with factory internals rather than anodized colors that wear through.

What changes. The button sits higher than stock, so you don't have to hunt for it mid-magazine change. The release action is the same spring-loaded push—this is not a ambi conversion or a catch-and-hold mechanism. You're buying a better surface to press, not a new function.

Before you buy. This is a direct replacement for the Type 1 mag catch on AAP-01 platforms. If your pistol already has a Type 2 or Type 3 catch, verify compatibility before ordering. Installation requires disassembling the grip frame and swapping the catch assembly. If you do not own the tools or have experience with GBB field-stripping, have a technician install it. The package includes the mag catch only—no tools, no hardware beyond what's required for the swap.