Tm M4 Sopmod Upgrades?

[hoggy21]

Is it possible to upgrade these guns yet, without causing problems or invalidating warrenties?

[Shadow-Hunter]

Re: Tm M4 Sopmod Upgrades?

I have no idea about warrenty but my mates added a 6.03 barrel, new custom spring and spring guild, seals and air nossle

[Kodiak]

Re: Tm M4 Sopmod Upgrades?

I've got in mine:

9.6v battery (Zero One will modify it to add an extra cell)
Prometheus 6.03 363mm inner barrel
Prometheus SOPMOD M4 cylinder head
Prometheus SOPMOD M4 air seal nozzle
Prometheus SOPMOD M4 piston head
Custom spring to boost it to 340-350 FPS without destroying the gearbox


And all my accessories. It shoots extremely well