Last page update 8-28-18
Version 2 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 V2 gearboxes: M4, MP5, G3, SR25*, MASDA, PDW, Scar, XCR, FNC, M249 (G&P)
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.