fifty50
Finish Build

Add Essentials

Select from the compatible essentials you need from the list below.

Choose your warranty to complete checkout

Weapon Shield 90

  • EXTENDED Industry Leading 90 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Priority processing time, Ships within 1 business days
  • Shipping Insurance
$9.99
Add & Checkout

Weapon Shield Extended 135

  • TRIPLE EXTENDED Industry Leading 135 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Priority processing time, Ships within 1 business days
  • Shipping Insurance

+ Tech Inspection

  • FPS Chronograph Certification
  • Gearbox Cleaning
  • Gearbox Lubrication
  • Fuse Replacement
$19.99
Add & Checkout

AMS Standard 45

  • Industry Leading 45 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Standard processing time, 1-2 business days
$0.00
Checkout

AMS Proshop Warranty Options

Airsoft Megastore is proud offer our customers the most comprehensive warranty options in the industry. Orders are processed within our standard 1-2 business days from the date of purchase and shipped out with your selected shipping method (chosen at checkout). All accessories and upgrade parts are shipped within their manufacturer's packaging, to best protect each part during shipping. Upon arrival, the player will need to easily attach their own parts. Please be careful not to void your warranty by opening your gearbox, or damaging any of the accessories, as they are not covered under any warranty.

We suggest that anyone investing in a gun from our custom proshop purchase a weapon shield protection plan. There's no sense in spending your hard earned cash on something this awesome and then be at the mercy of the manufacturer's limited parts warranty. Purchase a weapon shield plan, 90 or 135 day plans to protect your airsoft investment. Our 135 day plan includes an inhouse tech service that you have 135 days to use. Our techs will do a clean up that should keep your airsoft investment running like the day you got it. All Weapon shield customers are prioritized for order processing as well as other services. Join the our satisfied Weapon Shield customers today!

Customize It!
On Sale: Ending Soon!
product image

KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox

Get Free Shipping

  1. 1. Buy Any Regular Priced Item
  2. 2. or, Buy Any Sale Item + Any Non-Sale Item
  3. 3. or, Any Order Over $150
Free Shipping
$329.95Guaranteed Lowest
$370.99 RETAIL PRICE
SAVE!!!
  • Model: M4
  • Muzzle Velocity: 380 FPS
  • Build Material: Metal Receiver, Rails, Barrel
  • Weight: 6.5 lbs
  • Overall Length: 31.5" in. / 35" in.
  • Inner Barrel: 394 mm
  • Battery Type: 9.6V Nunchuck
  • Gearbox: Version 2 (Metal)
  • Magazine Capacity: 120 Rounds
  • Color: Black
customize it!
Notify When Available!

3 Ways to get Free Shipping

  1. 1. Buy Any Regular Priced Item
  2. 2. or, Buy Any Sale Item + Any Non-Sale Item
  3. 3. or, Any Order Over $150
Free ShippingThis item qualifies for Free Shipping

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


  • Details
  • Ratings & Reviews

NOTE: This item is exempt from expedited shipping and may take up to three business days to process and ship.

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.  With rugged full metal construction (full metal receiver, barrel, internals) and a solid enhanced 2nd generation gearbox, the KWA KM4 RIS is one of the most popular KWA M4-series AEG rifles of all time, designed to DOMINATE the Airsoft arena indoors and out.

The KM4 RIS is equipped with 9mm steel ball bearing bushings and a full metal removable rear iron sight.  KWA has installed a full length, metal laser-engraved integrated rail system for quick upgrade potential, allowing you freedom to customize your weapon with add-ons such as lasers, tactical flashlights, or even compact grenade launcher units.  A top optics rail also lets you run optics like a Trilogy Tactical 1x32 Red/Green Dot CombatOptix Scope.  The KM4 RIS is a full size AR-chassis carbine rifle that has the versatility of a carbine and the versatility that comes with the integrated metal rail system.

 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.

Features:
- KWA 2GX Gearbox
- KWA 2GX High Performance Bucking
- Full alloy construction
- Removable "Chopped" rear iron sight
- Adjustable front and rear sights
- 6 position collapsible stock with integrated battery compartment
- Flat top receiver
- 2 piece Rail Interface System
- Semi and Full Auto selective fire
- Adjustable Hop-Up
- 45 Days Product Warranty [US only]
- Lifetime Tech Support

Specifications:
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]:  31.50"/35" [80cm/88.9cm]
Outer Barrel Length:  368mm
Barrel thread:  14mm* [Counter clock wise]
Inner Barrel Length:  394 mm
Inner Barrel Diameter:  6.05mm +/- .03mm
Hop-Up: Adjustable
Magazine Capacity:  350 Rounds Hi-Cap 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 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 KM4 RIS 2GX Airsoft AEG Rifle, 1x KWA K120 120rd Polymer Mid Capacity Magazine, instruction manual,



People Also Viewed

More From KWA

Write A Review

  • Please do not use the review feature to ask questions. Any reviews containing questions will not be answered, and will be deleted
  • Please keep your review clean of obscenities and other distasteful content
  • Please be detailed in your review, and talk about what you like/dislike about this product
  • Click here to review submission guidelines.

Overview

***** 5 / 5
Based on 8 Review(s)
  • (8)
  • (0)
  • (0)
  • (0)
  • (0)
Write Your Own Review

Product Reviews

5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
KWA KM4 R.I.S. AEG

"THE MOST AWSOME AEG IN IT'S CLASS.KWA actually did it, an AEG that outperforms others in the airsoft field of play. I've been playing airsoft for awhile and competition games as well and noted that KWA AEG rifles do their job and then some. If you have'nt purchased this rifle yet do so now before they run out of stock. You will kick yourself if you do not."

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
KWA KM4 nuff said...

"This gun has an amazing rof, decent fps and range. This gun is also very durable and sexy. All kwa guns are amazing so not much to review. pros: durable, fast rof cons:none"

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
answer to question below and review

"yes the front site is removable its just not a thing you could do in the middle of a fight. just so you know. as for my reveiw: its the best airsoft rifle ive owned and was the best gun at the last war i was in. i recomend you stick with .25 gram bbs but i use 28s in my mid caps for a dmr effect in doing so i was getting 70 yard shots consistantly. i use g&g highcaps and king arms mid caps they all feed perfectly.jg mags feed alright and src mags have the same result. i was talking to ajax from tactical airsoft supplies and he said its a perfect gun but if your going for long lasting try and stay with a 9.6 v battery and below. quick review feeds nice good fps great accuracy awsome rate of fire(with a 9.6 v battry) full metal if your looking for a quality gun then this is it. i will be posting more reviews from different accounts as i continue to use and abuse this weapon system and i hope this helped."

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
great

"This gun amazing...very accurate and has good fps. I would recommend this gun to everyone"

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
KWA is truly the BEST EVER

"This gun is by far the best I gun I have ever owned! It shoots around 395 with .23 g bullets and has an amazing rate of fire of about 23-25 bullets per second (with a 9.6v). It shoots straight and accurately about 100-150 yards with the hop up dialed in. The internals are phenomenal and the externals are great too. Even if you scratch up the metal body (btw the Entire gun is metal but the pistol grip ans crane stock) it looks so much better because it adds character and looks awesome. it has your standard 14mm counter clockwise threads and nice laser engraved rails. THIS IS THE BEST GUN EVER GET IT BEFORE IT GOES OUT OF STOCK OR YOU WILL REGRET NOT GETTING IT. Pros-Full Metal Body Insane rate of fire Great range awesome fps phenomenal 2gx internals its KWA realistic weight about 7 pounds (May be con for weak people) it outperforms every other gun like thier model says Cons Crane stock has a tiny wobble but that is ups fault Hefty price tag for some Nothing else except that you dont have it yet! Also if your fps and rof lowers for awhile the spring is setting in so don't worry everything you need to know s in the manual."

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
AMAZING

"i got this gun for Christmas.and it is probably the best airsoft gun ive ever owned.i use a 11v lipo battery for it,so it screams bbs out like a mad man.great fps.but please people.this gun is ment for .25s,so dont even think about using anything under that,or it wont be very accurate. pros: great fps amazing rate of fire metal good weight AMAZING FIELD GUN cons: dont use it in cqb buy ALOT of bbs"

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
Beat Gun Ever

"Ok i bought this gun 3 days ago aid got it yesterday. 2 shots on semi auto at a soda can saws it in half, literally. I highly recommend this gun. Buy it!!! "

Was this review helpful to you?
5 KWA KM4 RIS Full Metal Railed M4 Airsoft AEG Rifle w/ 2GX Gearbox *****
On the money

"just one word Quality pros; realistic heavy build to last good fps good rps good stock metal flash hider rails in aluminum prime gear box cons: nothing to complane about this AEG"

Was this review helpful to you?

Free Shipping (Orders $89+)

45 Day Warranty

110% Lowest Price Guarantee

Best in Class Customer Service

Same Day Will Call Pickup

Great customer service, really worked with me.
The rifle I purchased came unable to work, I was able to send the item back and they sent me a band new one with no cost me. Also, their tech service was great as well!! Jasoncampbell, USA
Great customer service, really worked with me.
The rifle I purchased came unable to work, I was able to send the item back and they sent me a band new one with no cost me. Also, their tech service was great as well!! Jasoncampbell, USA
I love the pro gunbuilder by golden eagle!
The gunbuilder was very useful and made it easy for me to buy my first mid/high spec gun for just about $300. It gave me comfort in that i can get more parts to switch out at a later time if i wish to change anything about my rifle and that there will be compatible parts for any modifications i choose to do on it. The gun came in full working order and the hopup was even adjusted to be perfect right out of the box. I could easily hit targets over 150ft away constantly. Johnmstopka, USA
Best Site for Airsofting Gear and Guns
Every time I purchase from Airsoft Megastore I am very satisfied with my order. It arrives on time and the deals are excellent. AMS is probably my go to place for airsofting equipment, especially when I'm itching to add another gun to my collection! macawilliams12, USA
Awesome!
Mega store has been great I've been usen them for 3 years now never no problems. Great products and service fbfzh2005, USA
On point
Shipment was fast and complete technician I spoke to was very helpful. Helped me with problems I was having with my other guns. Very knowledgable with your products. sjstarheel, USA
I love Airsoft Megastore. My stuff is always on time and is always 5 star. This is the most honest and reliable place to buy airsoft guns of the internet! sgodwin2345, USA

Real People. Real Airsoft