Bearing spring guide + bearing cylinder head = repetitive?
 

I have a JG HK416 and it has a Modify bearing cylinder head installed. I'm wondering if it's really worth it to also install a bearing spring guide. It has the stock JG spring guide which is a solid chunk of metal so I'm not worried about that breaking anytime soon. It's got a Madbull M120 spring (pretty much equivalent to the stock spring).

FYI, it's a bearing piston head, not cylinder. Personally I prefer to have a bearing piston head just to be "safe", it puts less stress on the spring to have bearings.

I think you might get a small increase on fps as well, might not be too noticeable though.

If you have one side of the spring with a bearing, it's not really necessary to do it with the other side. But it can be done if you want.

Thanks guys. I figured it wouldn't really be necessary and thanks for the correction Gigaknight... it's a bit late. I'm not looking for an increase in FPS or anything like that as an M120 puts out plenty of power.

if it aint broken dont fix it.

you wont see much, if any improvements

On the contrary, when a spring compresses it rotates... If both points rotate (one against a polymer piston instead of on a bearing) it could eventually create a wear-pattern and weaken the piston.

It wouldn't hurt to be safer and go with both sides on bearings to allow the spring to freely rotate.

It's already freely rotating on the bearing in the piston, therefore it's not rotating on the spring guide.
Adding a bearing on the spring guide will just add FPS.

...because the pre-load on the spring will be higher.

And in some cases, can cause a jam. (seen it!)