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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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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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  • Ratings & Reviews

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 *****
Amazing gun

"Great gun, very accurate, great rate of fire. KWA SR10 bought through Airsoftmegastore online, and shipped through military post overseas. I've tested it out at 10Y, 25Y and 50Y with .32 BB's. Check out the video I made and you'll see the targets being shot at those distances. http://youtu.be/D11Fs7xrDzk"

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

"So I got this gun a few weeks ago and my first impression was oh snap that's a fatty rail. The gun feels really nice to hold with a grip and or rail covers cuz those rails be aggressive after a while. No wobble in any part of the gun. The stock wobbles a bit but nothing noticeable and it doesn't rattle which is nice. The sling point is nice but I use 2 point sling because the gun is just too long and awkward hanging straight down. (Easy fix magpul rail sling mount cuz all that rail space). Accuracy out of the box really good, fun times shooting at 50-75 feet. Over all awesome product I love it every body wants one once they shoot it a few times. Plus they got it to me in Canada no customs problems and good shipping time. If you like m4s and rail space plus a beast of a riffle then order this and some mags because the mags are nice and its picky with other brand mags."

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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 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 *****
Reliable, Quality, and Overall Great Purchase

"Prior to gloating about how terrific of a purchase this is, I'd first like to be critical seeing as people reading these reviews are considering the rifle themselves. If I can offer any advice at all, take everything (in this case every review - mine included) with a grain of salt. Some people have a habit of unboxing a great gun and giving an all too common "spur of the moment review". I've had this rifle for nearly a year now so I figured I knew enough to have obtained a helpful input. Some reviews of this gun are widely exaggerated. Few, if any stock let alone most custom airsoft rifles can accurately shoot 200 ft. Honestly, I just don't think people who make these wild claims can tell the difference between 50 and 100ft. Regardless, this gun does have quality FPS, range, and accuracy especially considering it is "stock" (a KWA 'stock' airsoft gun obviously holds much higher standards than your typical 'stock' rifle). With no modifications, this rifle can *effectively* reach distances of 125-150ft. While it can certainly shoot a great distance, you drastically lose accuracy and bb velocity after these distances which deems it ineffective at anything over 150ft. Some may look at this and think, "well the $75 Ak-47 model at Dick's Sporting Goods reads that it shoots 150ft"... Yes, this may be "true" but the key word is effective. The overall efficacy of an airsoft rifle's range is determined by its maintained velocity, bb drop, and cluster. Anyone who's played a game of airsoft knows what the "floaters" look like: the bbs still traveling a distance but with virtually no 'umph' behind them to hit targets enough so they can call their hit. The Sr10 stock can reach 125ft in an incredibly tight grouping and with very consistent velocity. This applies to both semi and fully automatic firing modes. Quite note on firing modes: I rarely if ever use full automatic because the trigger response and fire rate of this rifle is so great on semi, but if you're a "spray-and-pray" kind of demon, then this can absolutely provide you with a hell of a good time. The rifle has a nice weight and feel to it, so much so that you can quickly become immersed in your field of play. While this rifle does have a considerable range/accuracy and could certainly support a DMR role (though I personally feel airsoft DMRs are more for enthusiasts than pose any real game-play advantages), the Sr10 does hold this capability. It is important to note is that this rifle will without a doubt become your "Go-To-Gun" for outdoor gameplay. While CQB and indoors can certainly be considered with the Sr10 due to its incredible versatility, the full-metal build, weight, and length may slow you down (just something to consider). Honestly, just slap on a $40-60 optic (preferable 1X red dot, but this is one of the few stock airsoft AEG's that can effectively be used with a magnified site should you so choose) and you're ready to go. Indoors, outdoors, cold or hot, you name it, the Sr10 can do it. It's unimaginably reliable. Using it never gets old and due to its M4/M16 Rail Integrated System, its customization is practically limitless. While most find any "M4 builds" somewhat cliche, you can't help but admire the sheer variety of custom builds. This gun truly has no cons; mind you, I say this as a person who is constantly searching for flaws or down right expecting them as few things, if any at all, are perfect. However, the KWA Sr10 is exceptional. If you're considering this rifle and another rifle of similar make but are only caught in dilemma because of price skepticism, look no further. I would recommend this rifle."

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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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