Last page update 8-28-18

Version 4 gearbox

Anti-reversal Latch: V2/3

Class 1: King arms

Class 2: SHS, ICS, Guarder

Class 3: Lonex, Modify, ASG, VFC

Class 4: Laylax

Cylinder Head: V2

Class 1: A&K,

Class 2: ICS,

Class 3: Laylax, SHS, ZCI

Class 4: ASG, Lonex, MAXX model, 

Gears: V2/3 15 tooth sector gear drive

Class 1: A&K, G&G

Class 2: SHS, ZCI, Lonex, Modify

Class 3: Laylax, G&P

Class 4: Siegetek

Gear box: V2

Class 1: A&K

Class 2: 

Class 3: Lonex

Class 4: Retro Arms, SHS, Prowin

Nozzle: Varying lengths

Class 1:

Class 2: Guarder, Retro Arms

Class 3: Lonex, Shs, Laylax

Class 4: 

Piston: Standard 15 tooth

Class 1:

Class 2: SHS, Modify

Class 3: Lonex

Class 4: Laylax, systema

Piston head: AeG Standard

Class 1:

Class 2: Shs, Bravo

Class 3: Lonex

Class 4: Action Army, Maxx Model, Laylax

Spring: AEG standard

Class 1: G&G

Class 2: SHS, Action Army

Class 3: Laylax, ASG

Class 4:

Spring guide: V2 (v3 in quick change design)

Class 1:

Class 2: SHS, Madbull, Maxx Model

Class 3: Lonex

Class 4: Laylax

Trigger contacts: V2

Class 1:

Class 2: SHS

Class 3:

Class 4: Lonex

Guns that use V4 gearboxes: PSG-1

Item name: Compatibility 

Class 1: Manufacturers of replacement parts

Class 2: Manufacturers of good parts

Class 3: Manufacturers of great parts

Class 4: Manufacturers of the best parts

Version 2 geaboxes are best known for M4 gearboxes. They are good because of their extreme availability of aftermarket parts. Because of that, M4s and other V2 variants can be heavily upgraded. Every single part in a V2 gearbox can be upgraded with high end parts that will last for a very long time.

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0 South Lake Wilson Rd,

Hillsdale Michigan,