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Hi-Capa M4 Competition Adapter (DIY)

$69

Cerakote Color

Default is Grey (3D parts) or Black (CNC parts), no Cerakote applied. Learn more..

None Graphite Black +$39 USMC Red +$39 NRA Blue +$39 Multicam Bright Green +$39 Magpul Flat Dark Earth +$39 Bright White +$49 Gold +$49 Prison Pink +$49 Bright Purple +$49 Burnt Bronze +$49 Custom. Enter Cerakote Item ID in Checkout Notes. i.e. A-123 +$99

DIY Terms

This is a Do It Yourself item and cannot be return for assembly defects such as leaks or miss-feeds. Please inspect for manufacturing defects before assembly.

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Proudly Made in the US 1-Year Warranty + Lifetime Support *
SKU: TAPP-HICAPA-M4C-DIY Categories: , , , Tag:

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Hi-Capa M4 Competition Adapter (DIY) Details

Hi-Capa M4 Competition Adapter (DIY) — Carbon Fiber

Flared M4 Magwell DIY Adapter for Hi-Capa

The TAPP Hi-Capa M4 Competition Adapter (DIY) converts your Hi-Capa to accept M4 AEG magazines and adds a flared magwell for faster, more reliable reloads. This budget-friendly DIY kit uses your existing gas magazine for assembly and is 3D printed in Carbon Fiber (Nylon PA12 with the option of upgrading to PA11 Carbon Fiber composite) to deliver improved stiffness and wear resistance over standard polymer kits. While economical, the DIY approach does not match the seamless integration, fitment, or long-term durability of our one-piece Carbon Fiber adapters—those are recommended for competitive builds and heavy use.

Key Features:

  • DIY Installation: Assemble the adapter using your existing gas magazine to reduce cost and customize your setup.
  • HPA Powered: Optimized for High Pressure Air systems to provide consistent and reliable operation (HPA kit not included).
  • Flared M4 Magwell: Engineered for faster, more confident reloads during competition or CQB scenarios.
  • Carbon Fiber Construction: 3D printed in Nylon PA12 with the option of upgrading to PA11 Carbon Fiber composite for superior strength-to-weight ratio, improved impact resistance, and dimensional stability.

What’s Included:

  • DIY Kit: All necessary components for assembly using your gas magazine (magazine internals not included).

Note: Limited support is provided for DIY kits. For superior durability, seamless fit, and easier installation, we recommend the one-piece Carbon Fiber competition adapters.

Compatibility:

WE-Tech, Tokyo Marui, Armorer Works, Novritsch SSP1/SSP5, and other compatible Hi-Capa platforms—verify fitment before installation.

CARBON FIBER. CARBON FIBER.
CARBON FIBER.


Strength you can feel. Weight you barely notice. Precision that defines performance.
Matte black, rigid, and ready — engineered for those who demand more than plastic.

Unmatched Strength and Rigidity

• Up to 38% Higher Tensile Strength – 69 MPa vs. 50 MPa for Nylon 12, giving parts more load-bearing capability.
• Nearly 3× Stiffer – With a tensile modulus of 5.3 GPa (vs. 1.9 GPa), PA11 CF parts hold their shape under pressure and stress.
• Over 65% Greater Flexural Strength – 110 MPa vs. 66 MPa for Nylon 12 means stronger parts that won’t bend or deform.

Superior Heat and Environmental Resistance

• Designed for high-temperature applications where Nylon 12 softens or degrades.
• Carbon fiber reinforcement improves thermal stability and lowers thermal expansion for precision even under heat.
• Naturally resistant to moisture and UV exposure, ideal for rigorous outdoor use.

Professional Finish and Lightweight Design

• Carbon fiber infusion produces a sleek matte black surface — functional and aesthetic right off the printer.
• Delivers metal-like strength at a fraction of the weight, enabling lighter, more efficient assemblies.

Designed for High-Pressure HPA systems

• Lightweight carbon fiber composite reduces load without sacrificing strength or rigidity.
• Tested for durability across extreme temperature and humidity conditions to ensure reliable field performance.

Rigid Carbon Fiber Structure

• Low expansion under heat preserves airseal integrity during rapid-fire or sustained full-auto use.
• Machined precision surfaces ensure smooth magazine insertion and consistent alignment with feed paths.

Advanced Finishing

Custom Cerakote & Precision Coatings

Our in-house finishing delivers Cerakote and precision laser engraving with exceptional durability and style. Every surface is treated, coated, and inspected to ensure flawless performance and lasting quality.

Start Your Project

1 Year Warranty + Lifetime Support

All Tapp Airsoft products include a 1-year warranty. We also offer lifetime support for technical issues and replacement parts (fees apply).

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    Carbon Fiber Nylon 11

    PRO ADAPTER

    Designed for added Performance, Ergonomics and Aesthetics.

    +Low-Profile

    20-80% Condensed Dimensions

    We've designed each system to create the sleekest profile.
    +Strength

    CNC Feed Nozzle

    Areas under repeated use or load have been upgraded with replaceable CNC parts.
    +Feeding

    0.01mm Precision Tolerances

    BB-Stop tech optimized for flow and consistency.
    +Straighter Alignment

    Individually Designed

    Drums and mags are positioned to give a “meant-to-be-there” feel.
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