Matrix G2 Complete Gearbox Assembly for TM Compatible V2 M4 / M16 Airsoft AEGs (Type: Front Wire / 350 FPS)

"This gearbox turned out to be super fantastic and it performed great!! I recommend this gearbox for those looking to rebuild their M4!!

"Awesome ROF and trigger response on this gearbox! I swapped out my worn out gearbox in my basic JG M4 and this made the rifle a hundred times better! I paired this with a high torque/speed motor and a 9.6 NIMH and it runs smooth.

"Bought this and dropped it in my first AeG , a lancer gen 2 19B.....Works flawless.....I'm going to buy another to drop in another door aeg of mine. Not Krytac quality but I've had zero issues so far...crisp trigger response, and an electronic trigger with a true quick change spring.....I recommend it

"I made a previous review about it and I want to write another one for it. I officially had this gearbox for over a year. I had it as a spare gearbox since I "supposedly" got a newer one. Lo and Behold, I fried my new one and switched it back to this one.

From last time I chrono (my last game was in November 2014) it was shooting in between 378-381FPS with .20g. I chronoed sunday (7/26/15) and had the same fps on a M130. My gun is using the Madbull ultimate hopup with a 6.05 inner barrel and I can hit easily about 160ft using .25g. I gave it slightly more hop up and I was able to hit some at 102 yards. EVERYTHING is stock except the trigger contacts due to malfunction.

"I got this about 2 weeks now, and had to wait to my upcoming event to have a true test. I was able to hit targets at least 50+ft with confirm hits, debatable around 80ft. Mine came with a ported cylinder shooting at 348fps, which it isnt that bad. However, if you want full power change it to a non-ported cylinder.

MOSFET is COMPLETELY different from the picture and its an APS MOSFET. Since its rear wired, you have to either use a stick battery or use a nun chuck for crane style stocks.

All in all, it performs really good, and I am satisfied with my purchase :D

"This is an excellent gearbox so far; although when I received it, it did have a slight problem. It would fire on its own! I was thinking of RMAing it, but I decided I didn't want to wait, so I opened it up, and something corrected itself automatically. I replaced a few parts (piston with metal teeth, bore up piston head and cylinder head and air nozzle with o-ring) and now it works great.

Pros:
Pre shimmed / lubed
Spring guide notches are big (very helpful when assembling)
Strong tappet plate
Mosfet
Reinforced gearbox shell
Bearings (not ball bearings)
Gearbox screws (phillips heads, :P)
Easy takedown
Shoots hard (I haven't chronoed though)
Works very smoothly

Irritating things:
Putting the mosfet in the buffer tube
Wiring is a bit long, but it works
When assembling, it is hard to keep the trigger in place
Motor wire connectors aren't bent (I had to bend them myself)

Cons:
Plastic piston (has one metal tooth) - replaced with metal- toothed piston
Air nozzle (no o-ring) - replaced with an air nozzle with o-ring

I am thinking about getting another one of these gearboxes :D

"Some of the below review seem outdated mentioning what seem to be JG's older gearbox from 2010. I am sure evike gets these from JG with their orders of guns and these are the gearbox found inside a JG or Echo1 M4 carbine. It has 8mm bushing, my selector plate is black instead of yellow like the image and the mosfet has a nice hard casing to protect it from accidentals.

415 FPS out of the box on my new custom M4 running a stock JG 363mm barrel.

Over all, the item work as expected. Good strong parts and gearbox.

Great deal with a nice mosfet.

"Some of the below review seem outdated mentioning what seem to be JG's older gearbox from 2010. I am sure evike gets these from JG with their orders of guns and these are the gearbox found inside a JG or Echo1 M4 carbine. It has 8mm bushing, my selector plate is black instead of yellow like the image and the mosfet has a nice hard casing to protect it from accidentals.

415 FPS out of the box on my new custom M4 running a stock JG 363mm barrel.

Over all, the item work as expected. Good strong parts and gearbox.

"I dropped this gearbox in my jg m4,with a 9.6 battery,it punched half way through a boiling pot!!
Very good gearbox,i will be ordering another.

"Amazing gearbox! Popped it into my wounded JG M16A4 and it has brought the gun back to life! The rate of fire is almost doubled compared to the original JG gearbox and sometimes it shoots so fast that the mag can't load a bb in time!!! (Which may sound bad but with a spring low-cap mag it would work just perfectly. It makes me happy though!) Anyway the only con is that the battery connector is mini-type and did not fit the battery I had so BEWARE! It was an easy fix by just soldering the old connector to the new wires. It's like putting an M16 into the Pack-A-Punch machine, it really strikes some fear into those radical Muslims!

"Wonderful gear box. I am excited to put it in my echo1 stag 15 m4. With this kind of fps no one will be dishonest about being hit

"Nice gear box I placed it in elite force stubby and it shoots about 430 fps making it my back up close quarters gun, I give 4 stars out of 5 because I don’t think it can handle a m160 spring just yet, I will order again as this gearbox out performs aps, elite force, it might handle a m150 spring maybe

"Having installed several of these, I can say that they are a good choice for a stock replacement gearbox. There isnt anything remarkable about this gearbox and it does have a proprietary trigger but having a built in mosfet at this price point is a good trade in my opinion. All internal parts are of the stock variety that you see in most out of the box guns. The mosfet works fine and the trigger response with an 11.1v lipo and a high torque motor is snappy and responsive. We have tested this gearbox with high speed motors as well as high rate springs and have had mosfet failures however. It is best that you go no higher than an M120 spring and use a motor that will fire at 20RPS or less with an 11.1v Lipo.

Pros

Built in Mosfet
QD Spring mount
Good trigger response (as tested)

Cons

Proprietary Trigger, selector plate and mosfet design.
Mosfet is only (in our opinion) designed for M120 Spring and stock type motors.
Replacement mosfets are VERY hard to find.

"Gearbox is pretty okay, but the mosfet is poop. The mosfet blew out after i plugged in my 11.1v 20c lipo battery. As for the internals, they're pretty decent. Mine came JAM-PACKED with lube. There was literally enough lube for 2 gearboxes inside of it, though strangely they didn't use any of it in the cylinder. As for airseal... it could be better. A lot better. And i purchased mine directly from the evike superstore, so i believe the gearbox had been sitting on the shelf for a year or 2 because the "M130 spring" this thing allegedly has was shorter than my stock M110 spring. As for the shell itself, ive had an m120 in it running at around 15 rps and it's stood up fine. I've had the thing for about 3 months now and the only sign of wear it's showing is on the paint outside. Now as for the individual parts, Here ya go:
*M130 spring (or at least thats what it should be) - great
*Reinforced 18:1 gearset (my spur gear recently stripped because of a jam :'() - great
*Polycarbonate piston head with small o-ring (had a poor airseal) - sufficiennt
*Polycarbonate piston with metal tooth strip (just the last tooth is metal) - standard
*Polycarbonate cylinder head with one o-ring (and an extremely long nozzle) - standard
*Non-ported aluminum (I think) cylinder - great
*Reinforced metal spring guide with ball bearings - excellent
*Clear polycarbonate tappet plate - standard
*Polcarbonate nozzle - standard
*Mosfet (this one was crappy but in most cases a mosfet would make it excellent) - good
*Steel 8mm bushings - great
*Low resistance silver wiring - excellent
*Polycarbonate selector plate w/ copper contacts - good
*Reinforced metal cutoff lever - great
*Reinforced metal shell - great
That's about it, its a decent reinforced gearbox for mid-level airsofters, and definitely go get a Gate mosfet for this is you know how to solder.

"This is a good quality, high value mechbox for the price. Out of the box it was shooting 430fps with a standard 363mm barrel and m4 hopup. I swapped the spring with a M120 and it shot 398fps on avg, perfect for outdoor use as most of my fields cap full auto at 400fps.

Upon disassembly, the interior of the box seemed well lubricated - not full of the vaseline type grease seen in some other JG AEGs. I regreased and reshimmed the box before using but coming straight out of the box it looked fine - shimming could have been a bit tighter for lipo use but that is nitpicking. The piston head, cylinder, cylinder head and air nozzle form a tight airseal. Wiring is a decent gauge and can handle the load of a 11.1v lipo no problem.

Mosfet works well, trigger response is excellent with a 11.1v 1300mah PEQ lipo battery. ROF is exceptional, a quick tap of the trigger on auto will give you a double tap. The Mosfet chip is slim ehough to fit under a standard M4 RAS handguard (electrical taped to barrel to keep steady and water resistant) - just run the plug up to a PEQ box.

One potential issue: The control wire for the mosfet chip is very thin and the solder point rather fragile. When installing the wiring be gentle and DO NOT apply pressure/pull to the wiring harness - this applies to when you split the M4 receiver as well. Make sure to give yourself adequate slack.