Contact Us Tel:(626) 286-0360 Store Locations
COVID-19 UpdatesPhone Support M-F 9am-5pm PST
Browse by Type or Category
Happy July 4th! View Deals Here. Stay Safe! (Phone support will be closed on July 3rd)

Pre-Order ETA July 2020 Echo1 850rd FAT Magazine for M4 / M16 Series Airsoft AEGs (Color: Black)

ID: 37496 (MAG-E1-FAT-B)
ECHO1 / JAG810945023015MAG-ECHO M4 FAT BLK37496
4.5 stars, based on 13 reviews
Pre-Order ETA July 2020 Echo1 850rd FAT Magazine for M4 / M16 Series Airsoft AEGs (Color: Black)
Hover or touch above to zoom
Rifle in image not included
Youtube preview Product image 1 Product image 2


Pre-orders are always filled first but you can sign up below to be notified when the item is becomes available for immediate purchase.

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Color Options:

This is a pre-order item with an ETA (estimated arrival) of July 2020

A pre-order item is an up coming new product, or an item in the process of being restocked to the platform by it's manufacturer.By pre-ordering an item, you will have reserved the inventory availability to receive it before the goods arrive. All pre-order items are eligible for a full refund at any time during the waiting period; simply call or drop us an email with the order # and the pre-order item you would like to cancel for an immediate refund. Due to circumstances such as US customs inspection, factory delays and other situations out of our control, all ETAs (estimated time of arrival) are estimated to our best ability and are subject to change.


  • Full Metal Construction
  • Holds a massive 850 rounds

Color: Black

A clone of the fat magazine allowing a low profile magazine and high capacity at the same time!

Caliber: 6mm Airsoft BBs
Magazine Capacity: 850 rounds
Magazine Type: Hi-Capacity, Integrated Winding Wheel

Manufacturer: Echo1

About ECHO1 / JAG

Since its inception the Echo1USA brand has strived to provide our clients with uncompromising quality of products and customer service. As avid Airsoft players ourselves, we are able to understand the needs of the sport and the frustration with inferior products. Our commitment to yielding the finest most affordable Airsoft Guns and Accessories on the market today is steadfast, and remains the foundation of our continued success.

13 Customer Reviews

(Write a review)

by Stephen H. on 06/15/2018
"This Echo1 Fat Mag is *amazing* in combat. Grab 3 of these and you effectively become a support assault gunner. It is made of metal and fits into any gun that takes standard M4 mags. Well, except for mine, I had to stick a few layers of duct tape to the hole where the magazine locks so it wouldnít sag and not feed. Easy fix, no problem. No one else has been complaining about it so Iím just gonna guess my mag was weird. Winding is pretty easy, a little stiffer than JGís M4 mags but wonít imprint your fingers with plastic gear marks. These things hold a whopping 850 rounds, compared to standard 300 rounds, for only about $8 more. Thatís 550 more rounds, almost two more magazines worth! If you run through ammo or simply need a new mag, buy one of these. Theyíre worth it.

Feeds well, easy winding
850 ROUNDS!!
Made of metal
Fits any M4

May need some duct tape to keep mag in place (no one else is complaining, I may have gotten a slightly defective mag)
Does stretch your mag pouches a bit

Overall: Great mag, buying two more. If you need a mag, just grab one of these, itís got ammo almost worth 3 mags, for only about $8 more!
by Carol S. on 11/04/2016
"Got this for my KWA M16 which was $285
It is the only mag I need to carry.

Metal body (solid)
Fits better than the mag that came with the gun
Fits in my M249 which is broken );
Fits in G&G raider m4
Feeds fine with the 11.1 lipo in M16
Barely have to reload
I love going prone and this mag allows me to do so
No holes in bottom of mag for dirt to get in

Cons: spinning the winding wheel all the time gets
annoying, but better than needing to reload
by Denise K. on 06/18/2016
"SO TO START OFF WITH.... mags are pretty well made

second- great ammo capacity , I mean 850 rds people who doesn't want that

third- great overall totally worth the money.

great job evike

Questions, Answers and Comments

Discuss about Pre-Order ETA July 2020 Echo1 850rd FAT Magazine for M4 / M16 Series Airsoft AEGs (Color: Black) with your friends and fellow shoppers!

Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" when commenting to qualify for the giveaways!

Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!

California Proposition 65 Warning: Cancer and Reproductive Harm -

This is a pre-order item.

Pre-order estimated arrival: July 2020

By adding a pre-order item to your shopping cart, you will guarantee yourself to have the item reserved before they are offered as an in-stock item. Often, you will also save on shipping while not risking a rate item being sold out before you have a chance to buy it. Being the largest Airsoft distributor in the America continent, is the gateway for many exciting items entering the Airsoft world. All pre-order items are tagged with our best estimate on arrival times factoring in manufacture delay, us custom examinations and other factorys to the best of our ability. The goods on pre-order generally arrive before they are past due or on-time 99% of the time. All pre-order items are processed subject to item availability on a first-come, first serve basis. All orders and payments are processed at the time of payment. Buyer reserve the rights to a full refund on any pending pre-order items at any time.

This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.

Customers who bought this also purchased

Parts and accessories may not be compatible with the product displayed on this page. For compatible parts/accessories, see the You May Also Need section and please verify details on the product description page.