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G&P Complete 400 FPS 8mm Reinforced gear box for M4 M16 Airsoft AEG - Standard Deans / Front Wiring

3 Customer Reviews

by dan w. on 04/19/2015
"i bought 2 black ops vipers for christmas in 2013, one of them finally had trigger issues so i decided to upgrade the guts. this gearbox dropped right in, requiring only slight modification to the ORIGINAL motor connectors (i didn't buy a motor), the original 8.4v/800ma battery wouldn't turn the motor, but i had a 8.4/1600ma battery that i use for another gun and it works amazingly well. the diference is clearly visible with the naked eye, over 400FPS with .20 gram bbs. i lost the cool blow back and charging bolt effects of the viper, but it's well worth the 85 dollars i paid. it's really all metal bearings, super nice, well over 5000 rounds later and it's super awesome, extremely high rate of fire compared to the stock viper gearbox in my other gun. the only con i have is that occasionally the selector switch goofs up when going from semi to full out, and it locks you out like it is on "safe". but switching back and forth again fixes it. overall A+
by Garett P. on 03/17/2014
"Amazing I m buying a second one it is perfect for just a drop in into any m4
by Juliet C. on 05/04/2014
"I love this gearbox I am running a 11.4v lipo in this with the matrix magnum motor and i can get a good 21 rounds per second

pros: great drop in gearbox

cons: in the picture it shows a mosfet but it does not come with one