KWA MK45/USP Green Gas Drum

Price range: $109 through $259

Carbon Fiber

Built to last. Specialized production takes more time, its durability speaks for itself. Includes a 1-Year Standard Warranty.

Cerakote Color

Default is Grey, no Cerakote applied. Learn more..
*Drum body not cerakoted.

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

Extended Warranty

Extended 1/2-year US | 90-days International Learn more..

Free US Shipping On Orders Over $99 With Code "Freeship"
Proudly Made in the US 1-Year Warranty + Lifetime Support *

Product Details

Warranty/Support

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KWA MK45/USP Green Gas Drum Details

KWA MK45/USP Green Gas Drum

The KWA MK45 and USP series are widely respected for their realism and reliability in airsoft, delivering consistent performance with each shot. The TAPP KWA MK45/USP Green Gas Drum Adapter takes these platforms to the next level by integrating a high-capacity green gas drum, offering approximately 400 BBs per fill, reducing reload frequency for prolonged engagements. Designed and built in the USA, this pre-built, plug-and-play adapter ensures seamless integration with your KWA MK45/USP, utilizing green gas (propane) to deliver dependable and powerful performance in any airsoft scenario.

Key Features:

400 BB Capacity: This green gas drum adapter provides substantial ammo storage, ideal for extended skirmishes and sustained action.

Green Gas Powered: Optimized to work with green gas, ensuring smooth, consistent performance in your KWA MK45 or USP.

One-Piece Drum Adapter Design: Engineered to enhance functionality and reliability, ensuring smooth BB feeding for continuous action.

Durable Construction: Built from lightweight, resilient SLS Nylon PA12 material, designed to withstand the demands of intense airsoft gameplay.

What‚is Included:

Fully Assembled Green Gas Drum Adapter: The TAPP KWA MK45/USP Green Gas Drum Adapter is ready to use right out of the box, with the Armorer Works Custom Drum included if selected.

Mounting Screws & BB Passage Replacement: Ensures a secure fit and reliable performance, so you can stay focused on the mission.

Proudly made in the USA, this adapter is backed by a 30-day warranty and lifetime technical support, with access to replacement parts (fees may apply).

Compatibility: KWA MK45, KWA USP

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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