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Matrix "QD Fast Spring Change" 8mm Gearbox for M4 M16 Airsoft AEG - Front Wire
[GB-M4QD-F]
$70.00
by steven B. Date Added: Friday 23 December, 2011
I love the quick spring release so u don't have to take apart the whole gearbox, and I also lik the trigger response. To me there is nothing wrong with this product. Really reliable.

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