Drop-in gearbox?

[baconisgod]

So I currently have a mildly upgraded VFC M4 gearbox that doesn't fit in my Vltor body. I was thinking of buying a drop in gearbox and I found these 3:

(1) New Energy series Systema ENERGY CMB M120 Complete Mechbox / Gearbox for M4-A1 ($275.00)
http://www.redwolfairsoft.com/redwolf/airsoft/Accessories_AEG_Gearbox_Systema_ENERGY_CMB_M120_Complete_Mechbox_Gearbox_for_M4_A1_M4_RIS_S_SYSTEM.htm


(2) Older version Systema Mecha-Box (Gearbox) 1J (High Speed) for Marui M4A ($210.00, from another retailer)
http://www.redwolfairsoft.com/redwolf/airsoft/Accessories_AEG_Gearbox_SYSTEMA_Mecha_Box_Gearbox_1J_High_Speed_for_Marui_M4A1_M4RIS_S_System_FREE_SHIPPING.htm


(3) G&P 8mm Bearing Complete Gearbox Set for M4 Series ($125.00)
http://www.redwolfairsoft.com/redwolf/airsoft/Accessories_AEG_Gearbox_G_P_8mm_Bearing_Complete_Gearbox_Set_for_M4_Series_Rear_Wiring_Dean_Connector.htm


I have heard people for and against Systema drop-ins. If I wanted to take the G&P to a comparable performance level to the Systema, how much would I need to invest? What do you think?[/url]

[league 4]

I'd get the G&P out of those, or this if you'd consider it:

http://www.airsoftpost.com/product_info ... s_id=30248

But the G&P isn't worse than the overrated systema gearboxes which IMO aren't worth the price at all. G&P gears have a lot of axle problems though, I've seen so many different posts on forums about it happening and I've had it happen to myself also. If you replace the gears when they break with an SHS gearset, it'd be easily as reliable (if not more) then the systema.