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CYMA Standard Complete 8mm Version 2 Gearbox for M4 Series Airsoft AEG (Type: Rear Wired / With Motor)
26 Customer Reviews
by Kupono B. on 12/06/2008
"Question: would this fit on a Dboy M4?
Webmaster: It will fit "ALL" M4 series. Some modification might be required for certain brands. But generally, all M4 / M16 AEG Evike carries are Marui compatible. Thus, Yes, it will fit all DBOY M4 series AEG.
Webmaster: It will fit "ALL" M4 series. Some modification might be required for certain brands. But generally, all M4 / M16 AEG Evike carries are Marui compatible. Thus, Yes, it will fit all DBOY M4 series AEG.
by Daniel R. on 12/01/2008
"has anyone sent this through the chrono? thinkin about droppin this into a SCAR!
by Aiden W. on 12/20/2021
"Overall, pretty par for the course for a gen 2 gearbox, but some problems came along with my installation.
The main problem was the motor hookups, they just were so stiff, and the black wire’s hook broke off from it being so fragile to bending into the pistol grip. I managed to fix it by soldering a spare broken gearbox’s to it but not everyone can just do that.
On the good side however, it now works extremely well! The gearbox responds well to it’s trigger pulls, shoots fast and hard.
A good 4/5 on my experiences, but the problems may not be so easily fixed like mine were.
The main problem was the motor hookups, they just were so stiff, and the black wire’s hook broke off from it being so fragile to bending into the pistol grip. I managed to fix it by soldering a spare broken gearbox’s to it but not everyone can just do that.
On the good side however, it now works extremely well! The gearbox responds well to it’s trigger pulls, shoots fast and hard.
A good 4/5 on my experiences, but the problems may not be so easily fixed like mine were.
by James M. on 07/09/2016
"*Reviewer below me didn't check his compression*
For 50 Dollars here's what you get:
-ported brass cylinder (doesn't need replacing unless you're running a really long barrel)
-1 steel tooth piston (White) + white piston head with compression o-ring (it's alright)
-White cylinder head w/ 1 o-ring (Horrible, replace it)
-Clear nozzle w/ no o-ring (garbage)
-JG 18:1 steel gear set
-Oil retaining bushings
-metal ball bearing spring guide
-Appears to be a Fuse integrated into the wiring
Can't speak about the spring strength and wiring because I replaced them right off the bat.
For 50 Dollars here's what you get:
-ported brass cylinder (doesn't need replacing unless you're running a really long barrel)
-1 steel tooth piston (White) + white piston head with compression o-ring (it's alright)
-White cylinder head w/ 1 o-ring (Horrible, replace it)
-Clear nozzle w/ no o-ring (garbage)
-JG 18:1 steel gear set
-Oil retaining bushings
-metal ball bearing spring guide
-Appears to be a Fuse integrated into the wiring
Can't speak about the spring strength and wiring because I replaced them right off the bat.
by Tyler P. on 12/02/2015
"This gearbox is pretty good. I do have some issues.
Pros:
built well
good quality
good fps (havent chronoed yet but it seems high)
Cons:
doesnt fit well in a G&G raider body. It fits but doesnt act right
slow rof
fps might be too high
Pros:
built well
good quality
good fps (havent chronoed yet but it seems high)
Cons:
doesnt fit well in a G&G raider body. It fits but doesnt act right
slow rof
fps might be too high
by Richard L. on 10/31/2008
"Great gearbox for a quick swap out with whatever you have at the moment. If you have experience working with gearboxes, if you switch out the piston in this one, it'll make your life alot easier.
by Dominic A. on 11/21/2016
"This is a pretty good gearbox. The parts are decent quality and its is pretty easy to open up and work with. But.. There was almost no air seal in mine so I had to stretch out the O-ring on the piston head. After that, there was a decent air seal with the parts the gearbox came with. Another thing is the spring is pretty strong. After a little bit of messing with air seal its a pretty good gearbox.
by Antonin D. on 12/02/2008
"Question: should i be able to put this in my Classic Army m15a4 tactical carbine without any problem?
by Michael B. on 10/02/2024
"The piston in mine stripped after about 3000 shots.
by Jasper B. on 06/21/2016
"This gearbox worked fine, except my fps dropped to barely breaking 200 fps with it.... total waste of money
by Travis L. on 10/15/2016
"This is a piece of junk. Piston had no seal on on it, dropped FPS. The leads were poop and snapped as I put them onto the motor. Save your money and buy something worth while.