The Lean Mean Green Machine – Custom HPA Airsoft Build

The Lean Mean Green Machine is a one-of-a-kind custom HPA AAP-01 build, designed for players who want striking style and uncompromising performance. Featuring a tactical blend of durability, precision engineering, and aggressive aesthetics, this build is optimized for both speed and control on the field.

Built on the Action Army AAP-01 Assassin Pistol (Black) and upgraded with the CTM TAC FUKU-2 Shark CNC Upper in Army Green, this beast balances a bold look with lightweight functionality. The CTM TAC 7075 Advanced Charging Handle ensures smooth cycling, while the Action Army Steel Hammer and CTM 180% Recoil & Nozzle Spring Set deliver a reliable, snappy firing experience.

For stability and adaptability, the Action Army Folding Stock transforms the AAP-01 into a compact SMG-style platform, giving you tight maneuverability in CQB and the confidence to extend your range outdoors. Paired with the CTM FUKU-2 CNC Grip Panels in Green, the Lean Mean Green Machine isn’t just a name—it’s a statement.

Feeding this powerhouse is the PTS EPM1-S Enhanced Polymer Short Magazine (170rd Midcap), giving you unmatched capacity and feeding reliability to keep you in the fight longer.

Maximus HPA Kit – The Core of the Machine

At the heart of this custom build is the CTM Maximus HPA Frame Conversion Kit (Black), the ultimate upgrade that elevates the AAP-01 platform into a competitive-level HPA system. The Maximus kit provides:

• Rigid CNC Frame Construction for unmatched durability and precision.

• HPA Compatibility that transforms gas efficiency into tournament-ready consistency.

• Enhanced Ergonomics & Modularity, giving you full customization potential to adapt to any playstyle.

The Maximus kit ensures that every shot from the Lean Mean Green Machine is fast, accurate, and consistent—making it the backbone of this build’s power and performance.

Key Features at a Glance:

• CTM Maximus HPA Frame Conversion Kit (Black)

• Action Army AAP-01 Assassin GBB Pistol (Black)

• CTM TAC FUKU-2 Shark CNC Upper (Army Green)

• Action Army Folding Stock

• CTM TAC CNC Grip Panels (Green)

• CTM TAC Advanced Lightweight Charging Handle (Black)

• Action Army Steel Hammer

• CTM 180% Recoil & Nozzle Spring Set

• PTS EPM1-S Short 170rd Midcap Magazine (Black)

The Lean Mean Green Machine isn’t just built to perform—it’s built to dominate. A perfect balance of rugged looks, precision parts, and cutting-edge HPA performance.

Brand: AEX Custom (Base by Action Army)
Model: AAP-01 Assassin GBB - LEAN MEAN GREEN MACHINE
Type: Gas Blowback Pistol (Converted for HPA)
Color: Black / Green
Material: CNC Aluminum / Polymer / Steel
System: HPA 
Hop-Up: Adjustable
Magazine Compatibility: AEG M4 Mags
Weight: Approx. 3.5 lbs
Firing Modes: Semi / Full Auto
Charging Style: Side Charging Handle 
BB Type: 6mm
Tracer Compatibility: Yes