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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
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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
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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

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!

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CUSTOM JG Airsoft M4A1 F6604 Full Metal Gearbox Airsoft AEG Rifle

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$169.95Guaranteed Lowest
  • Model: M4
  • Muzzle Velocity: 440 FPS
  • Build Material: Polymer Receiver, Metal Barrel
  • Weight: 8 lbs
  • Inner Barrel: 363 mm
  • Battery Type: 8.4V Mini
  • Gearbox: Version 2 (Metal)
  • Magazine Capacity: 300 rounds
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  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
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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
  • Details
  • Ratings & Reviews

Our take: This Mission Ready JG M4A1 AEG is extremely versatile, with a retractable stock and long precision inner barrel, and can easily transition from close quarters to long range outdoor airsoft combat environments.  With an included carry handle rail mount and full metal Airsoft Megastore Armory Red Dot Sight, you can easily pick off your targets at long range.  Further enhancing the value and effectiveness of this AEG is the additional Airsoft Megastore Armory OpSpec One Point Bungee sling, which keeps the rifle secure and makes it easier to carry on the field during long airsoft games.  This package is an incredible deal on one of the most widely used and respected JG M4 AEGs with premium aftermarket tactical accessories, making this airsoft carbine ready to field right out of the box!  Pick up your Customized JG M4A1 AEG today, and start dominating the opposition on the airsoft field!

Custom Package Includes:

1. 440 FPS JG Airsoft M4A1 Carbine Full Metal Gearbox AEG Rifle - F6604


Operation:  Electric Automatic
Firing Modes:  Semi-automatic and Full-automatic
Muzzle Velocity: 400-410 FPS (w/ 0.20g BBs)
Magazine: 300-round high capacity (gear wind-up)
Gearbox:  Full metal
Hop-up:  Adjustable
Weight:  7 pounds 
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

2. Airsoft Megastore Armory Precision 7-Intensity Full Metal 1x45 Wide-View Red Dot Scope

3. NcStar Full Metal M4 Weaver Rail Carry Handle Mount

4. Airsoft Megastore Armory OpSpec Tactical Bungee Sling - Black

Package Includes: Rifle, rechargeable battery, wall charger, instruction manual, unjamming rod, 300-round high capacity magazine, Airsoft Megastore Armory Full Metal Red Dot sight, Airsoft Megastore Armory one-point bungee sling, NcStar carry handle mount,

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.

CUSTOM JG Airsoft M4A1 Full Metal Gearbox Airsoft AEG Rifle Categories:

GUN FORGE - Custom Built by AMS Customers

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***** 4 / 5
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Product Reviews

5 CUSTOM JG Airsoft M4A1 F6604 Full Metal Gearbox Airsoft AEG Rifle *****
to question

"In this case it means it is lipo compable but sometimes it does come with a lipo not very often but it does happen just read the decription!"

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5 CUSTOM JG Airsoft M4A1 F6604 Full Metal Gearbox Airsoft AEG Rifle *****

"Just got this in the mail today. Shoots very accurately at decent range, getting even better with the red dot attached. The one point sling is perfect for anyone who wants to distribute the gun's load while easily switching to a firing position. Overall I can not recommend this gun enough, and the added accessories are the perfect tactical compliment. 5 Stars!"

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5 CUSTOM JG Airsoft M4A1 F6604 Full Metal Gearbox Airsoft AEG Rifle *****

"does this gun come with a battery, and if it does, is it an 8.4 or a 9.6"

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2 CUSTOM JG Airsoft M4A1 F6604 Full Metal Gearbox Airsoft AEG Rifle *****
Ok for the first 6 months

"Don't let the high fps deceive you, this gun is a piece of garbage. For the first 6 months it was an ok gun. After a couple months issues started to pop up all over the gun. I had issues with the hop up, motor and gear box. It would have cost me more to repair it than to buy a new one. Ghee fire selector literally came loose than fell off the gun. The red dot that comes with the gun was broken when I got it. For the same price you can get a kwa cqr mod 1 which is 100 times better. The one good thing on this gun is the high fps."

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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
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