keep in mind, that even reinforced gearboxes wont last forever. Systemas is a slight improvement over the TM version 2, but it still has the same problem and weak points. Its just a problem with the V2, no matter what brand.
Personally, I use the Hurricane reinforced mechbox.

thanks again ^^ i understand now ^^

Unless you spring for the Pro Win gearboxes... ;)

And a new line of credit at your bank... I'll admit they look awesome, but who can justify that pricetag!

You'd notice the difference simply by cost as well. The PTW's are designed for LE and Mil training and is their 'training' line. Hence they tend to be a lot more costly than your standard AEG.

I must say that the mechbox that Illusion built for Nocturnal's M16A4 in the DTP body is still running strong after 3 years with no new parts needed. That bugger is the energizer bunny, it just keeps going and going - best box I've ever owned...

I can, I have been slowly building a M4 off of parts I scronge..... I have a pretty much everything except the front end and mech box(yet as soon as my Pro-win arrives). I am only in to this M4 for $45.00 right now and once I get a front end and the Prowin I estimate I will be in to the completed gun for $450. It was no problem for me to justify the cost seeing I have been trying to build the gun (minus mechbox) for $150.00

But I can totally understand if you had bought a stock gun and then wanted to drop a prowin into it.