Looking for a spring for a TM HK416D NGRS

[WonkyBoi]

I have a Tokyo Marui HK416D NGRS, and I am looking for an upgrade of spring for it. I have read online that there is no issue swapping in a stronger spring on stock internals so I do not have to worry about wrecking it, I am just looking for recommendations of springs. There does not seem to be a major selection of springs available, having myself only found these:

 

https://www.combatsouth.co.uk/cyclone-7-m100-spring-for-ngrs-series/

https://eagle6.co.uk/product/eaglesix-m100-spring-for-m4-ngrs-aeg

https://www.davescustomairsoft.co.uk/bespoke-airsoft-stel-tek-m100-spring-for-tokyo-marui-next-generation-recoil-shock-series

https://www.airsoftwholesaleuk.com/product/fps-m100-100m-s-steel-spring-for-tm-ngrs/

https://www.krale.shop/uk/spring-eagle-6-m100-for-tokyo-marui-ngrs/

 

I have also found this one which is stated as a TM next gen gearbox use, however from the picture you can see it is a non linear spring.

https://www.davescustomairsoft.co.uk/next-gen-hardened-steel-spring-m90-m100-m110

 

Due to the TM NGRS relying on multiple springs to operate as designed, the spring operating for pushing the piston in a linear spring, and these are also known to be shorter than other AEG springs. I am wondering if there is anyone with experience or has leads on good brand of spring for my scenario. Guarder, PDI and Prometheus do not seem to supply NGRS springs.

 

My intended goal is to squeeze out as much power out of the gun as possible, as Japanese limitations on AEG springs result in TM often running M85, so I wanted to upgrade to something more capable to fling heavier ammo. With possible changes later on such as inner barrel and buckig to aid this, for now I will just try a stronger M100 spring. I have had someone recommend eagle 6 springs but I am wondering if there is someone more informed on the topic to be able to shed some light on this for me.

 

Thanks in advance!

 

[Emergencychimps]

For context, I've ran tm recoils with increased power springs for about 10 years and my brother has a fully upgraded tm recoil as well. 

 

Best bet is to get a ngrs spring from eagle six. They are the first and leaders in ngrs custom stuff. There is an Italian firm that makes ngrs specific power springs too (kingdom of Airsoft supply them, FPS Airsoft I think theyre called).

 

The ngrs springs are shorter than standard aeg springs. Then it's just pick which power you want. 

 

In my cheapo stock version set up I've had to replace the gears at least 3 times each gun and a couple of pistons. Gears because stock gears aren't strong enough for upgraded springs, it'll work for a while but they will fail. Pistons were from having a MOSFET in mine and using an 11.1 lipo.

 

In my brother's no expense spared upgraded one (from eagle six, before MOSFETs became a thing) it's had a replacement spring and when I last took it apart after he had it for 7+ years it looked good as new. 

 

If you're making your power out and looking for that 340 mark, I'd strongly recommend replacing gears now as well. 

 

Another point to note is the stock spring is attached to the piston head, you can either replace the piston head or you can trim the piston head to reveal the screw that holds the spring to the piston.