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KWA KM4 SR10 Full Metal M4 SR-10 Tactical Airsoft Rifle

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KWA KM4 SR10 Full Metal M4 SR-10 Tactical Airsoft Rifle

Quick Overview

Full metal, 400 FPS, free float rail, crane stock, 9mm gearbox


Out of stock



The KWA KM4 SR10 features a full RIS and a crane stock. This AEG is ideal for anyone looking for an ideal outdoor rifle capable of extended range and accuracy.

With a 16 inch barrel, the KM4 SR10 is just barely longer than a standard M4A1.  The SR10 features a free float rail system, and the extended barrel matches most common civilian AR15 rifles. The KM4 SR10 includes a set of detachable iron sights, which can be removed for use of optics or flip sights. The battery is housed in the crane stock, which is a new design by KWA.  The KWA crane stock will fit a 1600Mah Chain Battery, or our custom 11.1v 1200Mah Lipo Battery.

Externally, the new generation of KWA AEGs features a nice matte finish on the body, with a lighter matte gray finish on the controls and the dust cover.  This, along with the laser engraved body markings, give the new KWA´s a much better look than the original satin black finish.

All KWA KM4 airsoft guns feature the new 2GX gearbox and hop-up bucking. KWA's lipo ready design is one of the strongest gearboxes in any airsoft gun. 9mm ball bearings provide efficient operation and excellent reliability. Elsewhere, the 2GX Gearbox is reinforced for longevity, and features a bearing spring guide and aluminum piston head.

KWA KM4 SR10 Airsoft Gun Features:

-KWA 2GX Gearbox
-KWA 2G High Performance Bucking
-CNC Machined 10" Free Float Rail
-Full Metal construction
-Detachable Iron Sights
-6 position collapsible stock with integrated battery compartment
-Flat top receiver
-Semi and Full Auto Fire Modes
-Tactical Sling Adapter

-Length Retracted: 844mm
-Length Extended: 920mm
-Inner Barrel Length: 394 mm
-Inner Barrel Diameter: 6.05mm
-Hop-Up: Adjustable
-Magazine Capacity: 120 Round K120 Magazine
-Velocity: 390-400 FPS with .20g BB´s
-Weight: 2970g

KWA Automatic Electric Airsoft Guns, or AEGs, run on KWA's famed 2GX gearbox. This reinforced V2 gearbox houses 9mm ball bearings, hardened steel gears, and a bearing spring guide and aluminum piston head. The 2GX gearbox is known for performance and reliability, putting out over 20 rounds per second on a lipo battery. Each KWA AEG replica is constructed with realism and attention to detail. You can see all the KWA Automatic Electric Airsoft Guns, or check out other KWA Airsoft Guns. KWA is the choice for those looking for performance airsoft guns for gaming or training.


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Founded in 2004, Airsoft Outlet Northwest (AONW) is the leader in quality airsoft and tactical gear in the Pacific Northwest. We're dedicated to providing the best service and products for our customers! We believe in honest and fair treatment of our customers while delivering superior value at a reasonable cost. That's why we offer the best warranty in the industry by providing in house warranty service on many quality brands like Classic Army, G&G, TopTech, and Echo-1. If you buy from us then you can rest assured knowing that you'll be taken care of.