Well, boys bear witness to the fruits of my labour. Overhauled my beloved ark's gearbox with great parts. 

*My only question is, could I run an m130 spring on its stock gearset without any issues down the line?*

Full parts breakdown as follows;

Barrel system :

Barrel : 6.02 x 410mm maple leaf barrel

Hopup : Stock metal ics slide style hop

Bucking : Maple leaf Mr Hop, 70° silicone

Nub : Maple leaf concave nub 50° green

Gearbox system :

Cylinder : Stock ics, I believe, non ported 

Gearbox shell : Stock ics v3

Gear set : Stock ics set

Shimmed : Yes, as best I can

Bushings : Stock 8mm bearings

Tappet plate : SHS blue reinforced v3 tappet

Nozzle : Maxx double O-ring, matches length of stock nozzle

Nozzle guide : Stock ics single O-ring, still provides superb seal

Piston head : Double O-ring ported piston head

Piston body : SHS Full steel tooth and blue polymer body

Trigger : Eshooter kestrel v3 basic ETU

Motor : G&G Ifrit 25k orange

Selector plate : Reinforced v3 selector orange, I think its SHS

Externals :

Eshooter smokey bt tracer

Unknown brand 1.5-4x lpvo

Temu mlok rail guards 

Ak quick release mag latch

G&G Rk74 midcap mags with modified lugs

0.33g G&G bio bbs

Ics Ark with m130 spring