[Jonoats]

Having bought my Mp5 last year I have been keeping a good eye out for reviews on the model which may bring to light any issues I may have to deal with. Upon recently finding your review, and hearing the complaints of the many other reviewers out there about their piston heads not sealing well, I decided I would take mine down and replace the piston head. Inside of my gun however is much different than the one you have pictures of. This may be an indication of G&G bringing their quality up, or it may be that either you got a lemon. Here is a list of what I found:
- Screws were still on the wrong side of the gearbox. (I find this funny, literally.)
- My Spring was non-linear and was definitely sized at 110. (100%)
- Same Cyclone piston head that did not seal. (equipped with ball bearings)
- Same brass cylinder.
- Full metal bearing spring guide.
- Same piston. (I found it to be good quality.)
- Ball bearing bushings, shimmed to perfection. (I'm really picky, and I loved it.
- Same shitty cylinder head which sealed. (does it's job.. but... yea...)
- No sign of wear on anything in the box. (including piston, excluding piston head)
- G&G gears (may have been metal may be crap) but they got G&G stamped on them.
- The barrel was also brass instead of aluminum.
- Motor was different having a black finish instead of silver. (pushes 18.3 bps with stock 9.6v 1400mah battery.)

I was very lucky to have taken this thing down when I did because the grease they used to lube the cylinder with was incompatible with the plastic used on the piston head. My piston head was cracked and half of it was in pieces everywhere. It caused no further damage to anything else, I replaced it with an area 1000 piston head, I had nothing else at the time. Will definitely need to chrony this bastard because if everything is sealing well, an m110 with bearing spring guide and bearing piston head should push anywhere from 370-400fps. Instead of the stock 345fps which mine chrono'd at 6 months ago. I must also add this gun is the most accurate AEG I have ever seen! I have shot the TM Sig, and G3 stock, along with my friends upgraded and some of them heavily upgraded guns. My friend's PTW is down due to a shitty mosfet they sent him, it is in the mail and I have never shot his gun to compare obviously it will beat the mp5. Everyone I have ever played with has agreed the accuracy on this gun is retarded. We try to get out playing every week to every other week for at least one full day. Maybe it's luck but this G&G mp5 G5 has got a shit load of hours on it and it's still crazy.