Systema Gearbox(Complete) upgrade
 

Hi, Since my TM M4's been not doing so well, I've decided to do a All-Round upgrade to it.

The thing that I like to start off is the gearbox. To be honest, I have done a lot of dry-firing before, and that might have probably worn out the stock gearbox, more or less. And with all the jamming, I've learned my lesson.

These 2 Systema Complete Mechbox are what I have in mind
SYSTEMA Mecha-Box (Gearbox) 1J (High Speed)
SYSTEMA Mecha-Box (Gearbox) M120 (Torque Up)

And then moving on to the barrel... and hop up sleeves(and of course the rubber)
Deep Fire SS 6.04mm Barrel
Guarder Improved Bucking

Outside Accessories:
5000Round Box Mag for M4-M16 series(Already Purchased)
JBU F8R Tactical Rail for M4/M16 Series(RIS)
Action Armor Rail Panel Set (Black)

And some random Foregrip, probably those "Bipod" integrated ones from HK Ebayers.

If you guys have any advices, I will be very glad to hear it, since I haven't done ANY upgrades myself before.

Thanks, I know I've made alot of threads needing help but, please put up with me :oops:

The Systema M120 mechbox with a KM inner barrel gave me a velocity of 430-440fps with 0.20g when it was installed in a team-mate's M4. I had to replace the spring to bring it down to field limits.

I really don't think the battery that I have right now(Sanyo 8.4v 600mah) would work well with the new gearbox since it seems to be too less of a powerful battery to run it.

So I'm thinking of this battery.

http://www.redwolfairsoft.com/redwol...l?prodID=17440

any good?

anyone?

yes, a large Sub C pack will help turn over an upped spring. That bat should do fine for u.

No. Buy yer batteries from www.cheapbatterypacks.com

Do this.

I see... thanks for the link, I gained some knowledge about batteries....

Their dimension sizes really help.

But I still have one more question... if I buy a 9.6v battery with a small female Tamiya connector(18AWG wire)(Airsoft Version), would it increase the ROF? since Im not changing the wire, i don't know if it would increase the ROF.

Thanks

I have a systema M120 box with a 550mm Prometheus 6.03" barre; and shoot 375 and my buddy has the same box but with a stock barrel (m4) and shoots 330. It's pretty odd. Systema definately has quality control issues!

Could be some air seal loss around your hop and inner barrel if the parts aren't fitting nice and tight.

Not to high jack this post, but didnt want to start a new one...

I just got the 2007 CA M15A4 Carbine and was wondering if the Systema M120 fully gearbox with fit in the CA with out mods. I have heard form dealers that the systema gear box wont fit some CA's...

I do know that the 120 Systema Mecha box fits the CA MP5 = No problem ! My guess is that you shouldn't have any problems yourself with the M15A4.

I was told that the older models 2006 and younger have to do some mods.

I have the 2007 CA M15-A4, but am not fully aware of where it stands as for the systema gear box..

If someone has done this upgrade, lets hear from you.

drool must get upgrades.

also, have anyone tried these kinds of barrels?

http://www.wgcshop.com/pcart/shopper...s%20for%20AEGs