KWA USP Compact HPA Drum

Price range: $119 through $208

PRO Adapter

One-Piece, Low-Profile, CNC Feed Nozzle, and Advanced BB-Tech. Learn more..

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 *

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KWA USP Compact HPA Drum Details

KWA USP Compact HPA Drum

The KWA USP Compact is a well-regarded airsoft pistol, recognized for its compact design and strong performance. The TAPP KWA USP Compact HPA Drum Adapter enhances this platform by integrating a high-capacity drum magazine, offering up to 1500-2000 rounds for extended gameplay. Designed and built in the USA, this pre-built, plug-and-play adapter ensures seamless integration with your KWA USP Compact, utilizing High Pressure Air (HPA) to deliver consistent and reliable performance in any airsoft scenario.

Key Features:

1500-2000 Round Capacity: The drum magazine provides substantial ammo capacity, ideal for prolonged engagements and maximizing your time on the field.

HPA Powered: Optimized for 150 max, recommended PSI: 150 max, recommended 120, this adapter ensures consistent and reliable performance, keeping your KWA USP Compact ready for any situation (HPA kit available separately at tappairsoft. com/hpa).

Advanced BB Feeding System: Ensures smooth, single-stack BB flow from the drum to the feed lip, minimizing ammo wastage and eliminating the need for inserts or double stacking.

Durable Construction: Built from lightweight, durable SLS Nylon PA12 with the option of upgrading to PA11 Carbon Fiber material, this adapter is designed to withstand the demands of intense airsoft action.

What‚is Included:

Fully Assembled Drum Adapter: The TAPP KWA USP Compact HPA Drum Adapter is ready to use right out of the box, with the drum included when selected.

HPA Foster Fitting (US Spec): Ensures a secure and reliable connection, allowing you to 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 USP Compact

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.

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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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