Complete Gear Box Set for Echo1 A&K Classic Army M249 MK46 Series Airsoft AEG

4.4 stars, based on 7 reviews

$105.00 $86.10

Model: GB-M249-UP

7 Customer Reviews

by ira a. on 06/15/2014
"For m249 replacement gearbox


1. It has the heavy duty micro switch.

2. Probably the most user friendly gearbox out there.


1. Nozzle was broken due to improper packaging.

2. Shim job on the gears was so tight that each shim was slightly concaved/warped.

3. Spur gear was warped.

This gearbox is easy to work on. After polishing the interior, swapping new spur gear with the old one and properly shimming, greasing and oiling...the gearbox and gun in general work great...just required some tlc.
by John R. on 05/01/2012
"great gearbox
only thing bad was fuse box was cracked in 2 places and my air nozle was cracked in half and the fuse was completely destroyed but didnt want to send it back cause its 3 parts to easily replace so i put the old air nozle on the new one and it was good to go
rate 5-5
by bryce b. on 03/07/2012
"Came in the mail today and it works perfectly, i have an a&k M249 para and the gears were destroyed after years of wear and tear. This pre-upgraded gearbox shoots around 390 FPS and around 17 bps with a 9.6v 2300 mah battery.

Pros: shoots Hard
Fits snug in my gun
Upgraded piston
Great trigger response

Cons: my fuse housing was cracked(fixed easy with some electrical tape)
The wiring wasnt quite long enough to wire to the front so I cut the zip tie and it was plenty long
A little more expensive than the average m249 gearbox
Has that nasty green gearlubish stuff in the gears, cleaned that out right away

Overall, 5/5 for this upgraded box. Brought my m249 back from the grave, I would recommend this.

Complete Gear Box Set for Echo1 A&K Classic Army M249 MK46 Series Airsoft AEG

Great for spare, replacement, upgrade and more! Having a spare gearbox is essentially having another gun! Pre-upgrad to shoot at 350~400 FPS. Great drop in ready to go gearbox. Spare shell and a spring guide is retailed for $85 alone. Great value offered directly from the origin of the best M249 series AEG out there. (Disclaimer: For experienced players only, due to that we cannot test complete gearboxes before shipping, it is recommended that buyers have gearbox knowledge.)

Complete gearbox includes:
-Gear Set
-Spring set
-Reinforced Cylinder / Piston set
-Metal Spring Guide.
-Switch Assembly
-All the screws
-All the wiring, tappet, and fuse.
-Reinforced Metal gearbox shell.

A great upgrade if you have a old version of the Classic Army M249! Newer design and better performance compare to older technology!
We have compiled a series of videos for AEG take down, assembly and gearbox for your reference. Recommended for experienced players only. A "gearbox" virtually never breaks, offers spare parts for all components. All gearboxes are sold as complete set of parts and "AS IS". All the gearbox are directly from manufacture. Buyer responsible for fine tuning and proper installation. is not responsible for shimming it perfectly or playing the game of airsoft for you.
For more information on complete gearboxes, please visit: Complete AEG Gearbox

Wanna chat about Complete Gear Box Set for Echo1 A&K Classic Army M249 MK46 Series Airsoft AEG?

Have questions about this item? We monitor these comments daily, but it may be faster to email us directly or call us at 1-626-286-0360.

Facebook about THIS with your friends! Comment for a chance to win awesome airsoft prizes. Details can be found on The Evike Facebook Fan Page HERE! Remember to leave "Also post on Facebook" checked to qualify your comment!

Items on Sale