Atlas Custom Works
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The AAP-01 is a solid GBB pump pistol, but the factory grip texture can slip during rapid follow-up shots. The Atlas Custom Works thumb rest gives you a positive contact point for your support hand thumb, which helps stabilize the pistol during the pump cycle and reduces hand fatigue over a long session.
Machined from aluminum and weighing just 20 grams, it adds minimal bulk while providing a defined ridge your thumb can find without looking. The black finish matches standard AAP-01 externals.
This is a small upgrade that matters most if you run your AAP-01 as a secondary on skirmish days. It's not for collectors who keep their guns in the case; it's for players who actually draw, pump, and fire under pressure. The thumb rest gives you a consistent anchor point without changing the pistol's balance or adding noticeable weight.
Includes only the thumb rest. Check the manufacturer's installation guide before you start — you'll need to field-strip the AAP-01 to swap it out.