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KWA Full Metal KM4 / M4 SR7 DEVGRU Airsoft AEG (2GX 9mm Gearbox Version)

ID: 32925 (AEG-KWA-SR7)
4.8 stars, based on 42 reviews
KWA Full Metal KM4 / M4 SR7 DEVGRU Airsoft AEG (2GX 9mm Gearbox Version)
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KWA Full Metal KM4 SR7 DEVGRU Airsoft AEG (2GX 9mm gearbox Version)

The second-generation KWA airsoft rifles feature over 30 structural improvements and performance upgrades, making them the top choice for professionals and serious enthusiasts.

The SR7 is the ideal close quarters weapon. Tuned for high speed, the SR7 fires at over 20 rounds per second yet maintains a velocity of approximately 350 feet per second within the limits of most indoor arenas. The SR7 features full alloy construction, MIL-SPEC-1913 picatinny free floating rail adapter system, 2GX Gearbox, 2G High Performance Bucking, adjustable flip up front and rear sights, flat top receiver, matte finish with individualized serial numbers, 6 position collapsible crane stock with two integrated battery compartments for nun-chuck style 11.1v Li-Mn batteries or 11.1v Li-Poly cell packs.

At the heart of every KM4/16 series rifle is KWA??s Second Generation Extreme (2GX) gearbox, designed to resist cold temperature failures. Structural reinforcement has been engineered into the shell strengthening the overall integrity of the gearbox especially in areas prone to failure. The 2GX comes standard with six 9mm Spherical Bearings and Heat-Treated Precision Gear Sets offering flawless performance in all conditions.

Accuracy of the rifles has been greatly enhanced with the introduction of the 2G High Performance Bucking. The bucking utilizes a set of uniquely designed ??Fins??that produce remarkable consistent performance shot after shot. All KWA inner barrels are now manufactured in Japan using the latest machining technology resulting in exceptional quality and increased performance.

Special Features:
  • Adjustable Hop-Up
  • 45 Days Manufacturer Warranty [US only]
  • Lifetime Tech Support

Disclaimer: Maximum recommended battery by KWA is 11.1V 15C 1600mah, to be under KWA warranty. Stronger batteries can be used, and will result higher performance and wear and tear, but is recommended for experienced players only. is not responsible for higher performance and higher wear and tear. We do offer all spare and CNC replacement parts for reinforcement, replacement and repair.

** 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.
*** Orange tip flash hiders are required for all US sales or where applicalble by law.

FPS: 350

42 Customer Reviews

(Write a review)

by Christopher M. on 08/24/2017
"PLEASE READ - This may be the best M4/MK18 for the money.

I've had this gun for a little less than a year, but I've taken this to the field many, many times. Since there's multiple things I REALLY enjoy about this gun, I'm going to segment this review into three parts.

1. Build quality:
KWA has made the sturdiest MK18/AR15 style AEG I've ever used. The metal is extremely resilient and you can buff out most scratches. The parts are incredibly durable and it comes out of the box with no wobble from the rail. Something extremely important to note! The stock DOES wobble a little out of the box, but this is 100% fixable. If you're buying this gun I suggest you get a really long phillips screwdriver, push the stock down to its lowest notch and screw that sucker up nice and tight. Eliminates the wobble ENTIRELY. Please don't let the "stock wobble" from other reviews deter you. It's incredibly flexible. If the rail, god forbid, does ever wobble you can tighten the 8 little screws just after the delta ring just under each rail toward the base and its solid again. Now if you happen to LOOSE the screws, I have great news for you.

2. Performance:
Shoots HARD and fast. Very accurate with minimal spread over a good distance. This gun already comes pre-upgraded and honestly you won't even need to upgrade it any further. This is honestly the best AEG I've used for CQB and even thought its rated for 360 FPS it hurts quite a lot.

2. Part availability:
Now with KWA I see a lot of reviews from even Evike staff saying KWA guns have proprietary parts and of course it does to some degree with it's system, but the main reason besides the two reasons stated above that I prefer KWA above anything else is the part catalog listed on their site if you lose or break anything. I actually lost a couple of screws that came loose from the rail system (the bottom most ones out of eight) and the rail became wobbly. After I discovered the issue, I looked on their site after consulting the gun manual for the part list that the gun came with (DO NOT THROW THIS AWAY). I actually noticed they sold a variety of barrel lengths and I wanted to get a suppressor, so I measured up the right size and it fit just like a glove. This is one of the biggest reasons I love KWA and I know that if anything ever goes wrong with my gun, I can order parts from the site. I haven't seen any other retailer do this and I recommend shopping on KWA's website.

Honestly I think I'll be shopping KWA for all of my future airsoft guns. Their prices are hard to beat and they build quality guns with good performance out of the box. I just LOVE that I can easily buy new parts and it's a god-send.
by Nathan M. on 07/24/2016
"I bought this gun 2 years ago with amazing expectations. Before I was using a stock g&g combat machine on an 11.1 lipo and I was really just looking for a more reliable gun that I could upgrade later. Probably 6 months after buying the gun I began my extensive internal upgrades. I built an insanely fast gun that used a massive brick battery. From there I switched the internals to a new gearbox and new gun and threw a Polarstar jack and just recently put in a protech. I've now added an R-hop and a 6.03 tightbore. Although I only used this gun "stock" for 6 months or so but I was more than happy with it. The FPS and rare of fire were great with an 11.1. I never worried about anything breaking or anything of that sort. My only con with this gun is the 2 piece hop up. I really wish I could use a prowin or a retro arms hop up.
by Brad B. on 04/29/2016
"This gun is amazing. I am kinda new to airsoft ( played for 2 years and plan on playing forever lol). This was my starter gun and at the time I didn't know much about airsoft guns and was kinda let down cuz I wanted an m249 but I took this gun anyway. Once I started to use it on the field and got to know more about airsoft guns internal wise I learned that an m249 is nothing compared to this sr7. Everything about this gun is perfect and worth it.


Amazing stock internals

I think it's made of steel

Pretty light weight for a steel gun

Comes with mag (kwa 120)

Too accurate to be true. Even with the fairly short inner barrel. I was able to be shot at multiple times then just turn around and shoot once and the other team would get mad cuz they thought I was cheating but the sr7 is just too accurate for CQB lol.


I couldn't buy 10 at once

The front sling mount makes a lot of noise but you can just tape it down and there will be no noise

2 piece hop up unit (this can be a pro or a con, personally I see this as a con cuz I can't put another hop up in it unless it's another kwa)

Doesn't come with battery or charger (most guns don't anyway)

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