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Angel Custom Upgraded Relay Switch Assembly For M249 Series Airsoft AEG

ID: 34840 (AC-M249-RELAY)
Angel Custom859188348400AC-M249-RELAY34840
5.0 stars, based on 3 reviews
Angel Custom Upgraded Relay Switch Assembly For M249 Series Airsoft AEG
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Angel Custom


Angel Custom Upgraded Relay Switch Assembly For M249 Series Airsoft AEG

The Angel Custom upgraded M249 relay switch utilized high resistance wiring and a high resistance relay switch which allows the user to run higher power batteries, such as 11.1 LiPo batteries through their gun lowering the likelihood of encountering issues with the wiring, trigger or relay components.

If you plan on using a LiPo or other high power battery in your M249, the Angel Custom upgraded relay switch assembly is a must have.


  • Allows the user to utilize the power of LiPo batteries while reducing the odds of damage related to LiPo use
  • Allows your switch system and motor to function with higher voltage batteries
  • Significantly reduces melted wiring and other M249 electrical issues
  • Replaces lower resistance, factory relay switch
  • High resistance 40 amp relay switch works with batteries from 9.6V to 12V
  • When used in conjunction with LiPo batteries your M249 will have a higher rate of fire and quicker trigger response
Application: Upgraded relay switch allows for use of LiPo batteries with the M249 AEG series
Compatibility: A&K, Classic Army, Echo1, Matrix and other compatible Airsoft M249 series AEGs. Not compatible with "Featherweight" M249 series.
Material: High resistance wiring, 40A relay switch

Manufacturer: Angel Custom

About Angel Custom

Angel Custom was founded on a mission to promote satisfaction and excitement on the Airsoft battlefield. Founded by Airsofters searching for perfections, it is our joy and pride to present you our battle tested creations. We strive to provide quality products and services that are reliable and trustworthy to be worthy of the trust placed in us.

3 Customer Reviews

(Write a review)

by Guillermo P. on 05/15/2021
"Pro : This thing is amazing will protect your AEG electrical and mechanical parts in your M249 I run all kinds of malfunctions on it , motor stop by reversing polarity jams break and relay blocks current from passing through to motor so open circuit no heat no movement totally dead = no damage. had gears and also motor jump off place or putting shims in teeth of gears to simulate gear destructive malfunctions guess what the relay kicks in right away and system stops no damage to mechanical or electrical parts no heat. Put oscilloscope to see output from spiking power through system every spike relay kicks in through spike and returns to close position when spikes deviate ( happens so fast you won't notice the malfunction that usually in the long run will cause issues that are prevented by this relay ( is solid like for automotive use). yes you could put a car battery to it and see what happens lol.
Negative: have it install by a tech or you will run in to issues that require electrical knowledge and mechanical solutions ( cabling wont fit in gun with gear box the way it comes) , and yes soldering ( switch ) and replacement of some connectors ( mini T dean for standard T dean )
This review is with a full metal m249 A&K
by nigel b. on 03/08/2020
"This is a nice wiring kit for M249. I used it in an A&K M249 with no issues. I will say the connector for battery was a weird mini deans instead of the basic red deans connector. That was the only complaint I had. If you are in need of a new wiring kit or looking to upgrade this is the one for you.
by Justin D. on 09/12/2015
"Ok, so I've had my A&K saw for over 2 years now, the trigger switch has always been a problem, I used to run high voltage batteries through my saw all the time and burn through trigger switches like crazy. During OP bad blood east, I really messed it up. I pushed my SAW to its limits with a 11.1v lipo with the stock wires and I ended up melting the wiring lol so I gave myself an ultimatum, spend $500 for an SMP conversion or spend $40 for this little ticket and *hope* it makes my saw worthy again. There are literally zero reviews or installation guides on this wiring, so I took the chance. And I'm glad I did! The black box is much bigger than you would imagine lol so I had a hard time figuring out where to put it, i ended up tucking it under the barrel, because it was too large to fit in my full stock. Wiring everything up was easy, although it uses mini deans connectors, that may be a con because you may have to leave your tamiyas behind or buy an adapter or new batteries. But with a mini deans 7.4 lipo with 1350mah, I was able to shoot over 2000+ BBS and the battery still read a to atleast 2/3 of a charge! (Thanks to my little lipo alarm) I do recommend buying a new trigger switch if you buy this and install both at the same time. That way there you can insure the longevity of your new system. I might be the first review ever for this upgraded wiring, so if you are contemplating buying this or spending another $450 to P* your saw, you do have a budget friendly option :)

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