G&G M4 FPS Upgrade

[Metzler]

Hello all,
First I want you all to know i spent hours going through the threads to see if there was a prior user that asked these questions and of course there are a mix for all different guns. I did not find anything directly related to my gun.

I just purchased this gun a week agao and while field testing it with .2s it rang in around 320-330fps and with .25s it hit around 290-295.

I am not looking to hurt anyone but during that game i noticed several pistols shooting just as far as my M4, doesnt really please me to know that lol.

So I have been of course informed the spring is an instant FPS upgrade but depending on what you get can damage your gun.

Going onto Velocity arms they had a sale on all there Systema springs and the only one left was a M110, which i purchased for 12 dollars. I dont care if its the wrong one if it is i will give it to someone who can use it.

So can someone tell me if that Systema M110 is worth using and if so what else MINIMUM should i upgrade. I have no issue going to the max and upgrading everything but what do some people with lots of experience recommend.

Thanks for reading this I hope someone can help,
Metzler

[m102404]

Personally...I hate upgrading everything just for the sake of buying fancy parts. Many "stock" parts from good makes perform perfectly well...if they're setup properly.

General things:
- make sure you have a metal spring guide...bearing stack or not...if a plastic one breaks, chances are extremely high that you'll damage other more expensive parts. A bearing stack will add 10-20fps.
- make sure you have metal bushings vs. plastic bushings. If you have 8mm bearings...you're probably stuck with those...I haven't seen readily availble 8mm bushings.
- make sure your gears are shimmed properly...this will allow them to take the increased load with a minimized risk of breakage/wear (they'll still wear...hopefully not break!)

A 110 spring will probably put you very close or over most field limits (400fps)...depending on other things (i.e. bearing piston head, compression, tightbore barrel, etc...). You may want to get a M100 spring (Modify makes nice springs...s90/s100/s110/etc) just in case.

That'd be a minimum of what you should consider...everything else is a bit of a tougher call to make.

Best of luck!

Tys

[hebet]

Originally Posted by m102404

Personally...I hate upgrading everything just for the sake of buying fancy parts. Many "stock" parts from good makes perform perfectly well...if they're setup properly.

General things:
- make sure you have a metal spring guide...bearing stack or not...if a plastic one breaks, chances are extremely high that you'll damage other more expensive parts. A bearing stack will add 10-20fps.
- make sure you have metal bushings vs. plastic bushings. If you have 8mm bearings...you're probably stuck with those...I haven't seen readily availble 8mm bushings.
- make sure your gears are shimmed properly...this will allow them to take the increased load with a minimized risk of breakage/wear (they'll still wear...hopefully not break!)

A 110 spring will probably put you very close or over most field limits (400fps)...depending on other things (i.e. bearing piston head, compression, tightbore barrel, etc...). You may want to get a M100 spring (Modify makes nice springs...s90/s100/s110/etc) just in case.

That'd be a minimum of what you should consider...everything else is a bit of a tougher call to make.

Best of luck!

Tys

I agree with m102404, Modify makes very nice springs and a S100 should do you just fine. There are however other springs out there, so don't feel like you have to stick with just modify. I need to reinforce this, upgrade to metal bushing and a bearing spring guide and or a bearing piston head. When you get a spring with higher tension, it will have a tendency to spin and twist around inside the gearbox. That is why it's a good idea to get one or both the spring guide with bearings and a piston head with bearings. Tightbores can add 5-15 FPS as well. Take your time with shimming, It's not easy to do and I still have to perfect the art of shimming myself. Proper lubrication can help too. If you are still having trouble talk to you local gun doc.

[KND]

I usually do gun doc by myself but the art of shimming that you are talking about is really give me headache, Everything else seem fine and I'm pretty sure that I can do and upgrade by myself. To save this headache, I just spend a little bit more to get the modify modular gear set. No need to shimming. Just a matter a few buck more. That would help me a lots.

KND

[AngelusNex]

Just get a tightbore for it. will give you better accuracy, fps and range. (about 20fps more tops) I suggest madbull black pythons. Don't worry about the spring.