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KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition

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  • Model: M4
  • Muzzle Velocity: 380 FPS
  • Build Material: Full Metal
  • Weight: 6.5 lbs
  • Overall Length: 33.25" in. / 36.25" in.
  • Inner Barrel: 425 mm
  • Battery Type: 8.4V Nunchuck
  • Gearbox: Version 2 (Metal)
  • Magazine Capacity: 120 rounds
  • Color: Black


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  3. 3. or, Any Order Over $150
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Must Haves

BB CombosBBsExtra MagazinesFace & Eye ProtectionGun BagPremium BatteriesSmart Charger for AEGsTactical Protective GlovesUniversal Tactical Sling

Tactical Gear

Tactical Vests

Upgrades and Add-Ons

Flashlights & LasersScopes and OpticsTactical Foregrips
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Our Promise:  KWA AEGs are renowned for their world-class performance and exceptional build quality.  With an exceptional 45-day factory warranty and LIFETIME tech support offered directly through KWA, we feel most qualified to be YOUR premier KWA dealer.  In addition, you are guaranteed to pay the absolute LOWEST price on the market for your new KWA AEG rifle, backed in writing by our industry-leading 125% Lowest Price Guarantee.

Our take:  KWA is engaged in manufacturing the industry's most prevalent "LiPO-ready" AEGs that are engineered to function smoothly with Lithium Polymer batteries right out of the box.  The KM4 SR10 full-sized AEG rifle features rugged full metal construction (full metal receiver, barrel, internals), a high-quality enhanced 2nd generation gearbox and ultra high-torque motor set up, and a Mil-Spec-1913 full metal free floating rail system, which lets you run mounted accessories like a tactical stubby vertical forergip.  The SR10 stays true to KWA's mantra, and is a top of the line Airsoft weapon that's Engineered To Outperform.

The NEW KM4 SR10 is equipped with 9mm steel ball bearing bushings and a removable metal CQB rear sight, along with a CQB up front sight for accuracy.  KWA has installed a lengthy, robust free-floating MIL-SPEC-1913 Picatinny RAS [Rail Adapter System].  This laser-engraved RAS allows for quick upgrade potential, giving you freedom to customize your weapon with add-ons such as lasers, tactical flashlights, with enough length to even be outfitted with a grenade launcher unit.  A clear top sight rail gives you freedom to mount pretty much any optic out on the market.

The SR10, as mentioned before, is a full-size rifle.  The extra barrel length over the more compact SR5 and SR7 variants allow for the SR10 to be more powerful and accurate.  Because a 5-point retractable rear stock is installed, the SR10 does not sacrifice quick maneuverability.  KWA's line of AEGs is priced at a premium for a reason:  they offer the hottest rate of fire "out-of-the-box" performance on the market and have internals that will last considerably longer than any of the competition.

KWA USA stands behind their product and offers a 45-day warranty and lifetime tech support on all KM4-series AEGs.

Battery and charger are NOT included.  Airsoft Megastore recommends the Tenergy 9.6v Nunchuck Battery with a standard NiMH Smart Charger for use in this rifle.

- KWA 2GX Gearbox
- KWA 2G High Performance Bucking
- Full metal alloy receiver
- CQB adjustable front and rear sight
- Free Float MIL-SPEC-1913 [Picatinny] Rail Adapter System
- 6 position collapsible stock with integrated battery compartment
- Flat top receiver
- Semi and Full Auto
- Adjustable Hop-Up
- 45 Days Product Warranty [US only]
- Lifetime Tech Support


Operation:  Electric Automatic
Build/Body:  Full Metal Receiver, Full Metal rail system/barrel
Gearbox:  Full metal KWA 2GX
Firing Modes:  Semi-automatic and Full-automatic
Overall Length [Retracted/Extended]:  33.25"/36.25" [84.45cm/92.07cm]
Outer Barrel Length:  368mm
Barrel thread:  14mm* [Counter clock wise]
Inner Barrel Length:  425mm
Inner Barrel Diameter:  6.05mm
Hop-Up: Adjustable
Magazine Capacity:  120 Rounds Mid-Cap KWA K120 magazine included
Caliber:  6mm Airsoft BB
Velocity:  380+ FPS** with .20 gram BB's
Rate of Fire:  18+ RPS**
Weight:  6.5 lbs.
Power:  8.4V, 9.6V NiMh Mini Nunchuck Battery, or 7.4V, 11.1V Lithium Polymer (LiPO) Nunchuck Battery [Maximum 11.1 V, 20A continuous]

Ammo type:  Seamless 0.20g or heavier (0.23g, 0.25g, 0.26g, 0.28g, etc) BBs.  For maximum performance and accuracy, Airsoft Megastore recommends GoldenBall ProSlick BBs which carry perfect spherical consistency and density, available at Airsoft Megastore for the lowest price on the market, guaranteed.

* Orange tip flash hiders are required for all US sales or where applicable by law.
** Individual test results may vary depending on brand of bbs, and chronograph used.
*** Results are based on tests conducted with 11.1v 1500mAh 15A LiPo batteries.

Package includes:  1x KWA 2GX KM4 SR10 AEG Rifle, 1x Polymer K120 120rd KWA Mid Cap magazine, instruction manual

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***** 4 / 5
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Product Reviews

5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
greatest long range assault rifle for under $500

" This gun easily nails a 4 inch in diameter target at 150 feet and can still hit the same target about a quarter of the time at 200 feet. When aiming at a human sized target you can be accurate at about 220 feet. I suggest the use of a 9.6v batter because an 11.1v lipo will break this gun after 5000 rounds. NO GUN IS TRULY LIPO READY! at least not for more than a few thousand rounds. This rifle could easily be used as a dmr (designated marksman rifle). The sr10 chronos at 395- 400 fps and shoot 23 bps with an 11.1 (still do not recomend) Some argue that the sr12 is a better rifle. This is true but only for sniping. The sr10 and sr12 have the exact same internals. the only difference between the two is the longer barrel on the sr12 which allows for more accuaracy, range, and fps. But the fps is then too high so you need to shoot 2k rds to wear down the spring. I know that the sr10 is defianetely the best aeg."

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
The 2013 KWA M4 SR10 is amazing

"I purchased this gun from airsoftmegastore because at the time of this review the whole nation and most shops are out of stock on this new upgraded 2013 model and for good reason , this gun is accurate to the T and the FPS is amazing out of the box. I started using this gun the moment I received it as I jsut happened to have a RC helicopter and airplane Lipo that fits perfectly in the KWA's lipo are in the crane stock. I use this gun mainly for plinking around but this would serve as a awesome battle rifle too. im using Javelin .25 gram Bbs and couldnt be happier. use the right BBs that are recommended by Airsoftmegastore.com and be sure to pick up a speedloader for your K120 mag for easy mag refill Thanks Airsoftmegastore!"

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****

"I recommend this gun for all levels of players. When people buy KWA they know they are buying a quality gun that will last. Also this SR-10 is ready to through on your favorite addons thanks to the free-floating MIL-SPEC-1913 Picatinny RAS [Rail Adapter System]. Another great feature is the accessibility of the full metal gearbox. This airsoft weapon is a great investment and you will not be sorry."

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****

"I am 11 years old and this is an amazing gun totally recommend getting this way better than ics or ca"

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
One of the best

"KWAs new 2GX gearboxes are insanely reliable. And this gun is one of the best. I have gotten so many recommendations for this gun its not even funny. It's well worth the investment. Also, guy who spent $60 getting it fixed, If you can't fix it yourself, then you shouldn't be buying guns like this. I have fixed every broken gun I have ever owned myself."

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
To the guy below me

"It is both it's about an inch longer than a regular m4 but shorter than an m16 this gun is very reliable if your debating on it get it"

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
best gun ever................... litarally

"if you put a kong power 11.1 v lipo in this thing shoots 1300 rpm and at 450 fps per shot and its soo accurate this can cut through a soda can in 20 shots buy this gun, you wont regret it!"

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5 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****

"K=Killing W=With A=Attitude Plain and Simple"

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4 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
Overall a high quality gun

"Overall this is a high quality gun. I highly recommend KWA. PROS: - The construction rivals a real AR-15. - The gun shoots great. It feels"solid" when shooting, not "tinny" like my JG. The gearbox is smooth. I use a 9.6v nunchuck and the ROF is great! - It is very accurate for an airsoft gun. - I love the 120 round mid cap magazine, works great! Cons: - This gun is very heavy. It weighs 8 lbs (including the battery) which is more than a real AR-15. - The only reason I gave it 4 stars is because it shoots left and that bothers me. I have my rear sight set as far as it will go to the right. I expected the barrel alignment to be better on a high end gun like this."

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4 KWA KM4 SR10 Full Metal 2GX M4 RIS Airsoft AEG Rifle - MILSIM Edition *****
Perfect in every way

"This gun is just flat out amazing. just buy this gun and stop worrying about the price tag. it is worth every penny. the externals rival those of some real-steel firearms, and the externals have held through thousands of BBs in 6-degree weather as well as high-90 degree weather. the loss of one star is not for the gun, but for this site. the picture above shows flip-up sights, but the gun actually comes with rail mounted standard iron sights. this is because kwa had a law issue about a patent or something. OVERALL: stop comparing this gun to a classic army or jg or something and just buy the Kwa. you will be glad you did."

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I ordered a gun sling a couple weeks ago. Unfortunately, one of the clips broke. After a few email correspondings with a customer service representative named Jun (my emails did not show a last name), AMS sent me a replacement sling for free. I did not even have to send my clip back. AMS is a terrific store and I plan on doing more business with them. They were polite, efficient, and just a pleasure to work with. I would recommend Airsoft Megastore to anyone. mskanwischer, USA
Airsoft Megastore is The Best Airsoft Website Out There (I Think) and i Will Always Be Loyal to AMS and Order Almost All of my Gear From Them. The Customer Service is Also Amazing, Jun my Customer Service Representative Has Helped Me With Anything i Needed Help With, Especially My Order Problem (Had 2 Magazines Missing from Order) and Jun Helped Me With The Problem, and Now The Mags Have Been Shipped To Me. Thank You So Much AMS and Jun. Ethan1214, Saskatchewan, Canada
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