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Pre-Order Estimated Arrival: 07/2014 --- Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 series Airsoft AEG ( M120 / Front Wiring)
[GB-Monster-120F]
$110.00
by Marc P. Date Added: Friday 27 November, 2009
great gear box all and all. one of the down falls i had with mine is the piston head it self. after about 1000k rounds it cracked in half it would be alot better if an aluminum piston head was put in to replace the stock plastic one. i am running a g&p m120 motor and a 11.1v lipoly battery and my m4 sits at around 450 at 18-19 rps. my friend bought the same exact box for his and after i installed it and put it through the chrono his was shooting over 500 fps so i think there might have been a mix up in the box type. after i put an m120 in it i had at around 440 fps or so.

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