CTM TAC “M4XIMUS” HPA Conversion Kit for AAP-01 / AAP-01C
Built for Versatility. Engineered for Dominance.
Inspired by the resilience of Maximus, the M4XIMUS HPA Kit transforms your AAP-01 into a high-performance sidearm capable of feeding from standard AEG M4 magazines. Whether you're dominating CQB or laying down suppressive fire, this kit delivers modular power, rugged construction, and unmatched control.
Key Features
Wide M4 Magazine Compatibility
Compatible with most AEG M4 magazines including brands like PTS, Poseidon, Guarder, and G&G. Fully adaptable to your current gear.
Durable Construction
Made from high-strength nylon fiber, both the kit body and magazine shell are built to withstand impact, wear, and high-pressure air use.
Real-Time BB Tracking
Side windows on the kit and magazine let you monitor BB movement and remaining ammo at a glance.
HPA-Ready Magazine Shell
Engineered to safely handle high-pressure air, ensuring consistent and reliable output.
Precision CNC Machining
Includes a CNC-machined M4 magazine release button and VELO adjustable competition-grade trigger for personalized performance and faster response.
Upper Compatibility
Works with all AAP-01 uppers, including stock and aftermarket variants.
Compatible with Standard Magwells
Fits all M4-style magwells for simple integration.
BB Lock System
The magwell connector includes a BB-retention system to prevent spillage during reloads.
Not Compatible With
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Other trigger specifications outside VELO design
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The CNC Modular Kit for AAP-01
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Requires internal parts not included (see below)
Parts Not Included (Required to Complete Build)
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Hammer housing
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Hammer set
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Upper locking button and spring
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Trigger lever and spring
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Magazine release button and spring
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Magazine nozzle seal / gas route rubber
Installation Requirements
This kit requires technical knowledge and the following tools:
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Punches (various sizes)
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Rubber mallet
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Allen keys
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Basic AAP-01 disassembly experience
HPA Details
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Power Source: HPA
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Fitting Type: US standard
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Materials: Polymer and aluminum
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Color: Black
Recommended Use
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Best paired with PTS M4 AEG magazines
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Ideal for speedsoft, competitive, or high-capacity outdoor builds
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Offers faster reloads and higher reliability under stress
M4XIMUS isn’t just a cosmetic upgrade—it’s a complete system enhancement for serious AAP-01 users.