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Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 Series Airsoft AEG (M150 / Rear Wiring)

18 Customer Reviews

by Benjamin C. on 10/23/2013
"This gear box quickly shook the fire selector into only capable of using Safe and full-auto. The provided piston had it's gears striped after about 2500 rds.
by Travis S. on 11/11/2013
"Horrible gearbox. Mine didn't work right out of the box. I should have returned it, but I thought it would be a simple fix and I needed it ASAP. Come to find out it was a bad pour on the gearbox shell and it was rubbing on the gears. By opening it up I voided the warranty. I ended up buying a g&p gearbox and it worked great. I guess I will just use the parts inside the gearbox as spares. It just doesn't make sense to me to put good parts in a bad gearbox shell. The shell felt very light and flimsy compared to other gearbox shells I have. So I have no idea why it says it reinforced. I won't be buying anymore AIM/Matrix products in the future. Heck the G&P gearbox was even cheaper and it's much higher quality.
by James M. on 03/28/2009
"I installed the gearbox this morning and I am sad to announce that it failed horribly. After 300 rnds I noticed it started to sound funny and the fps was dropping significantly. tI opened the gearbox and found that the polycarb piston head shattered into a dozen pieces which in turn destroyed the cylinder head. Upon further inspection, I noticed the switch assembly was very flimsy and was beginning to burn up and melt.

My boss bought the front wiring version of this gearbox and had the same experience.

We are both using 11.1v lipos with 20c discharge. As for this box being lipo ready, I would recommend buying a different box.

On the plus side. I do like the stronger design of the case and the ballbearings, but until Matrix fixes the weak internals I wouldn't recommend this to anyone.