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JG / CYMA Enhanced 8mm Gearbox for M4 / M16 Series Airsoft AEG Rifle - Rear Wired
[GB-8mm-M4-B]
$60.00
by armando s. Date Added: Thursday 12 February, 2009
This is a good gear box, I used it on an m4 with madbull tightbore and I got about 450fps now I am ussing it on my MP5 with a 120 spring and madbull tightbore and I get around 380 to 390 fps. I did have to change out slecetor plate, air nozle and the triger to get it to work on my MP5.

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