CTM M4XIMUS HPA Frame Conversion Kit for AAP-01 Pistols: In Stock Now!

Take your AAP-01 build to the next level with the CTM M4XIMUS HPA Frame Conversion Kit — designed for players who want the firepower of an M4 in the compact, lightweight frame of their favorite gas blowback pistol. Born from countless hours of development and engineering by CTM, this conversion kit transforms your AAP-01 into an adaptable HPA beast capable of feeding from standard AEG M4 magazines. Whether you're dominating on the speedsoft field or outfitting for competitive play, the M4XIMUS is built to deliver smooth BB feeding, robust construction, and game-changing versatility.

The M4XIMUS isn’t just another adapter — it's a complete reimagining of how an AAP-01 can perform. Constructed from high-strength nylon with 42% fiberglass and reinforced CNC aluminum components, this kit is as durable as it is innovative. CTM poured passion into every design detail, from the custom-engineered BB pathway to the sleek windowed magazine that lets you watch rounds feed in real-time. Plus, with compatibility across virtually all major M4 AEG magazines and AAP-01 uppers, the possibilities are nearly endless.

If you’re the type of player who refuses to compromise between power and speed, this is the kit you’ve been waiting for. The M4XIMUS makes your pistol as dominant as your rifle — with faster reloads, massive BB capacity, and the reliability you need to stay in the fight longer.

READ OUR FULL AEX BLOG ON THE MAXIMUS HERE

Features

• Compatible with standard AEG M4 magazines from brands like PTS, G&G, Poseidon, Guarder, and more.
• Seamless BB pathway designed for smooth feeding from M4 mag to pistol mag.
• Open-window magazine design allows you to watch BBs feed along the side.
• Includes precision CNC-machined M4 magazine release button for secure mag changes.
• VELO adjustable CNC competition trigger included for customizable trigger sensitivity.
• Durable main body construction using nylon with 42% fiberglass for maximum strength and longevity.
• Compatible with uppers and mag wells from all major AAP-01 brands.
• HPA-ready magazine built from high-strength nylon fiber material capable of withstanding high-pressure setups.
• BB-locking design on the M4 connector to prevent BB loss during mag changes.
• Inspired design and naming, delivering rifle-like performance and capacity to your pistol setup.

Specifications

Item Code: CTM-KIT-0560
Length: 205 mm (estimated based on standard AAP frame dimensions)
Weight: 310 g
Material: High-strength nylon with 42% fiberglass, CNC aluminum 6061 components
Compatible Magazines: AEG M4 magazines from brands like PTS, G&G, Poseidon, Guarder, and more
Colors Available: Black (BK), Tan (TAN), Pink (PNK)
Holster Compatibility: Compatible with GA Holster
Compatibility: Works with all AAP-01 upper receivers and mag wells; not compatible with non-standard triggers