Finish Build

Add Essentials

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

Customize It!
On Sale: Ending Soon!
product image

390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox

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 Shipping
WAS : $114.95
$91.96Guaranteed Lowest
YOU SAVE $22.99 !
  • Model: M4
  • Muzzle Velocity: 390 FPS
  • Build Material: Polymer Receiver, Metal Rails
  • Weight: 6.5 lbs
  • Overall Length: 29" in.
  • Battery Type: 8.4V Nunchuck
  • Gearbox: Version 2 (Metal)
  • Magazine Capacity: 300 rounds
  • Color: Black
customize it!


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 & LasersOther AccessoriesScopes and OpticsTactical Foregrips
  • Details
  • Ratings & Reviews

Our take: The A&K M4 CQB AEG is part of A&K's line of performance oriented, quality CQB AEGs. These polymer-receiver A&K AEGs are built to be high speed, and perfect for close quarters Airsoft combat. These A&K AEGs not only feature lightweight and durable polymer bodies, but also include everything you will need to start using the rifle! The A&K M4 CQB includes a rechargeable battery, a standard wall charger, a 300rd high capacity metal magazine, a tactical fore grip, two rail covers, and a metal replacement flash hider! The M4 CQB AEG has great range despite its compact size, shooting accurately over 100 feet! The M4 CQB AEG is the best choice for close quarters battle, due to its compact size, lightweight frame, and high rate of fire.

The M4 CQB AEG features a fully adjustable 6 position tactical crane stock, making this AEG more maneuverable and well adapted for close quarters combat. This M4 CQB AEG can also easily hold its own in an outdoor environment. With a precision inner barrel and fully adjustable two-piece hop-up, it can easily hit targets beyond 100 feet! The M4 CQB AEG features a high-quality impact-resistant polymer upper and lower receiver, a full metal rail system, a full metal outer barrel, and metal front and rear iron sights. The full metal rail system is crafted from lightweight anodized aluminum, and is perfect for attaching a variety of tactical accessories and upgrades. The polymer components on the rifle are the retractable stock, carrying handle, and the motor grip. The A&K M4 CQB's construction is extremely durable, and has an ergonomic feel and realistic weight.

The A&K polymer body M4 CQB AEG has a redesigned and reinforced metal gearbox with a factory installed high speed motor, making it one of the best-performing  polymer body M4 AEGs on the market for under $150! The full metal gearbox features metal bushings, a metal ball bearing spring guide, a full steel gear set, a high speed motor, and a perfectly sealed cylinder. The A&K M4 CQB also features a two-piece hop-up unit as well as a 6.04mm precision inner barrel, providing excellent range and accuracy. The M4 CQB AEG can easily hit targets at over 150 feet away!  

Overall, the A&K M4 CQB AEG provides the best value for the lowest price on the market. With a solidly constructed full metal high performance gearbox this AEG is able to hold its own against some of its top tier AEG competitors. The A&K M4 CQB provides great accuracy and hard hitting power in a compact carbine size platform. If you are looking for a lightweight CQB AEG, but can't afford the top tier price tag this is definitely the AEG for you!

- Impact resistant polymer body for maximum durability
- High performance metal gearbox and high speed motor
- 300rd high capacity magazine included
- Top rail for optics and accessories
- High performance AEG rifle, shooting at 320-390 FPS!
- Extremely durable
- Ready to go out of the box!

Operations:  Electric Automatic
Firing Modes:  Semi-automatic and Full-automatic w/ functional safety
Build:  Polymer receiver, stock, grip / Metal gearbox, rails, outer barrel
Gearbox:  Full Metal Version 2
Magazine:  300rd High Capacity (gear wind-up)
Muzzle velocity:  320-390 FPS with 0.20g BBs
Battery Type:  8.4V Nunchuck
Rate of fire:  13 RPS (Rounds per Second) with an 8.4v battery
Weight:  6.5 lbs

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.

Package includes:  A&K M4 CQB, 300rd hi-cap magazine, a vertical foregrip, 2 x rail covers, rechargeable mini-type battery, standard wall charger, and cleaning rod

Battery Charger Recommendation:  Although this fully automatic airsoft rifle comes with a standard wall charger to charge the battery, Airsoft Megastore recommends the use of a smart charger to avoid overcharging the battery(overcharged batteries may cause decreased airsoft gun performance and may shorten battery life significantly).  Smart chargers not only shorten charge time significantly (up to 800% faster charging), but more importantly,also automatically shut off once the battery is fully charged to avoid overcharged batteries.

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.


***** 4 / 5
Based on 11 Review(s)
  • (8)
  • (2)
  • (1)
  • (0)
  • (0)
Write Your Own Review

Product Reviews

5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****

"Wow, this gun is GREAT! It's FPS is OK, but with a spring change it's hitting 400-420. The battery is good, but I'd recommend a 9.6v 2000mAh. Anyway, enough with that we'll go through the pros and cons. PROS- EXTREMELY durable, high RoF, OK FPS, feels real, weighs real, 6 position stock. CONS- not completely metal, needs some upgrades (but when you get them it outperforms some of those WoM (waste of money) 300$ guns), grip that comes with it is bad (but it's free). And to the guy who gave it 3 stars because it didn't come in the original box but the gun was great...get out."

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
Great gun for any player.

"For the money you're spending, it's a five start no doubt, but it's no super pro gun. Disregard all reviews saying it's full metal, it's most certainly not. Every rail on the gun is metal, the outer and inner barrels are metal, and the the sights are metal. The rest (Upper and lower receivers and stock) is made out of very strong and durable ABS Polymer. I put a 9.6v battery in mine and it shoots very fast and very hard so I suggest getting one if you don't own one. The hop up will have to be adjusted as it comes preset on the the highest setting and just shoots bb's upwards. Pros: Strong body, removable flash hider (annoying to get off...), metal rails, accurate, powerful, good for CQB, long range and mid range. Cons: Flash hider is very hard to get off, battery is ridiculously hard to get in (unused to crane stocks), barrel is loose as with every M4 (can be fixed with 2 O-rings or epoxy, check youtube). I would recommend this to anyone who is looking to advance from beginner to intermediate guns or to a pro looking for a very customizable CQB M4 at a great price."

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
A&K M4

"Overall this AEG rifle is great, I recommend you buy it since it's on sale and it has a good performance. Also the either things that is good about this gun is that well it's like in the middle of heavy and light, so it feels like a pistol you are holding in the war but just bigger. I found nothing bad about this gun so it's pretty good, unless you aren't really going for the rifle."

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****

"I got this gun 2 months ago its a very good gun. I have used it in an match and it worked great. we played for 4 hours and it didn't die. It jammed but if you go automatic it unjamms itself. Putting the battery in is a pain but it's still great, every thing is metal :) (almost). Great rof and shoots accurate. I got 8 extra mags for this (midcaps) they feed so well i would never trade or buy another gun."

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
A&K M4

"Overall I would say this is a great gun, it has a good weight to it along with good maneuverability. The battery lasts for just about as long as you would need it to, and the rate of fire that it puts out is very nice. You will more than likely need to adjust the hop up once you get it, but its really not that much of a chore. The only thing is that the RIS surrounding the barrel wiggles a tad, but it doesnt make it any less solid. Overall, I would definitely get this gun. Installing the battery was a bit of a pain, but you just have to work with it and it should slide right in.The only thing I would recommend is that you buy a smart charger, that way you don't overcharge/fry the battery."

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
best gun

"i got thei gun and put all new internals into it put a m190 spring in and a tight bore 6.01 in and now it shoots at an average of 590-650fps planing on getting a metal body for it"

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****

"i got my gun and i have had it for a long time and it works great"

Was this review helpful to you?
5 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
A&K M4

"I ordered this awesome looking gun last Sunday and I am very exited to get it. I know I will not be disappointed. Airsoft Mega Store is the best. Very excited."

Was this review helpful to you?
4 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****

"i got this gun about a week ago and so far its pretty good. the bbs in the mag run down pretty fast so i recomend getting a second mag. when you pull the mag out, a bunch of bbs fall out which is a waste. the gun comes with enough to fill the mag. one of the cons is that i almost broke the stock trying to figue out how to get the battery in because the gun doesnt come with a manual, so i went on youtube and looked up the gun name and they show you how to get the battery in. i would also get a 10,000 rd bag of Goldenball bbs for maximum accuracy. but overall its pretty good. if i could go back a week to pick out a gun i would pick this one!"

Was this review helpful to you?
4 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
A&K M4

"Extremely reliable, replaced with a 6.01 tight bore barrel. I'll soon be putting a metal body with it. The bad thing about this gun in my opinion is the battery it comes with is hard to put in. So far best M4 I've handled"

Was this review helpful to you?
3 390 FPS A&K Airsoft M4 CQB RIS AEG Rifle - Full Metal Gearbox *****
Missing something

"The gun itself is really good, I have no complaints. But when I got mine, it didn't come in the original box and was missing the instructions."

Was this review helpful to you?

Free Shipping No Minimum*

45 Day Warranty

110% Lowest Price Guarantee

Best in Class Customer Service

Same Day Will Call Pickup

The store is amazing. I have found there items that I could not find in other stores which makes it the best. I have made questions and inquires about products and the customer service has responded super fast with accurate answers. All my products have arrived in excellent conditions in spite of other stores. My last product came late because it was rescheduled but that was UPS fault I think. I would like to thank Matthew for his exceptional customer service. Whenever you need help, please try to contact him. My advice, buy in Airsoft Megastore, they have coupons and the widest variety of airsoft products. RandyLoy, USA
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
I love that Airsoft Megastore has videos of most any information you will need to learn and care for your products. I purchased an AEG for my son and in short order, unfortunately, it began grinding after brief use. I emailed for warranty repair with symptoms and with 24 hours (22 to be exact) I received an email explaining possible causes with a video like for tuning the gun. I had the gun working again within 15 minutes, avoiding returning the gun and the mess associated with returns\repairs. Excellence on Sean's part to help out a first time customer of theirs. Highly recommend. bucfanjeff, USA
Everything worked great, shipping was super fast. I am very pleased and won't hesitate to order through airsoft megastore again. rob_riley, USA
I loved buying from airsoft megastore because the employees helped me recover my tracking number and told me where the package was at, I would love to buy from airsoft megastore again! Battlefield4Rule, USA
Be our next fan! We are focused on long lasting customer relationships. Try us out. Find out why everyone is raving about Your Name, Your Location

Real People. Real Airsoft