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Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 series Airsoft AEG ( M160 / Back Wiring)
[GB-Monster-160B]
$110.00
by Philip A. Date Added: Tuesday 26 April, 2011
I'm very happy with my purchase, as with the vast majority of evike's selection. Though one thing I'll point out about this gearbox is that YOU MUST ME MECHANICALLY INCLINED to install and tinker with it.

FIRST, there was no contacts on my selector plate. Of course I placed my old M4 selector plate on.
SECOND, the pin holes DO NOT match up on CA receivers, nor did they match up on my buddy's JG 416.
THIRD, my in-box wiring was grounded out on the gearbox when I received it. A multi-meter shown no continuity when tested through the trigger. After disassembly, whatever motor evike or the maker used to test this gearbox with had sliced the positive wire which wraps around the opening to the motor inside the gearbox. Obviously someone used a pinion gear that was a tad too big. :(
Not a problem for me, I have several V2 gearboxes with spare parts laying around, it's just a shame that I won't be able to use these 8mm bearings in my AR.
Everything else came sturdy and amazingly built. I love the piston.

I must say though, This is quite amazing for someone wanted a pre-built box for their rifle. BUT I must say that I could not just "drop" in this box into my CA M16 and run without modifications. :\

Still 5 stars in my book. Easiest upgrade. Consider wiring, grease (as the inside shown metal shavings. :O ), possibly an alternate gearbox, high torque motor (preferably the matrix 3k), and a selector plate. Consider using your old air nozzle too, this one misfeeds every few shots and I know it's not the mags.

Chrono'ed and averaged 552fps w/.20g KSC BBs. (I use .30's for accuracy, as should you.)

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