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JG / CYMA 8mm Reinforced Gearbox for M4 M16 Series Airsoft AEG with Mosfet - Rear Wired
[GB-M4-MOS8mm-B]
$70.00
by jared a. Date Added: Wednesday 01 December, 2010
This gearbox is very good. i have taken it apart for a spring swap and had this chance to view the parts closely ( i will list the parts and quality at the end). I bought the gearbox for a g&g raider and had to customize the wires in order to makre it work. but afetr all of the cusomizing i have found it to be an excellant gearbox for the money.

part/quality
m130 spring/good
bearing bushings (not ball bearing)/excellent
torque gears/excellent
ported cylinder/excellent
plastic cylinder head (one o-ring)/good
air nozzle (no o-ring)/good
plastic piston with full metal teeth (second tooth is not removed)/excellent
plastic piston head (not sure if it is ball bearing)/excellent
full metal spring guide (not ball bearing)/excellent
standard v2 tappet plate/good
standard trigger box/good
standard anti-reversal latch/good
Reinforced steel gearbox shell/excellent(only time will tell)
silver low resistance wiring/excellent

Only time will tell for the durability of this gearbox, please remember you may not get a gearbox that is as duable due to factory issues, so be ready for the liability. overall great gearbox.

Rating: 4 of 5 Stars! [4 of 5 Stars!]
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