LOL this quote is amazing. I chuckled out loud at work... nicely said. :D

And that is why the spring is still in the box! I keep it around for that diagram haha

Agreed, words to live by! I think nthe biggest problem is the PDI 150% springs largely come in lengths ranging from 6 3/8" to 7" long. How's that for consistancy? :confused:

I was thinking more that a PDI spring was more like the ugly girl in a bar at last call. You know you shouldnt, but the more you look at her, the better she looks and in the end, your just gona stick it in anyways.

....

Another awesome quote from the awesome quote factory that is TokyoSeven :D

Don't forget to double bag it, and use rubber gloves.

And fire.

Is that in regards to the spring or picking up a gal at last call? Usually for the latter I just recommend a large paper bag and a tench coat with a hole in the back.

yeah my PDI 120% was shooting higher than a PDI 130 should have lol

Just installed a Systema bearing spring guide and M120 spring into my AUG using the "coils go towards the spring guide" advice. :D

I am never helping you do that again. I think I broke a nail.
Lets work on our crap canon project later.

Yeah it definitely takes more than 2 hands. It's a bit difficult.

Is there a difference between a normal spring and a "Irregular-Pitch Taper Spring"? or is it the same thing? :confused:
http://shop.ehobbyasia.com/systema-i...ude-psg-1.html

And is there a such thing as quality with a spring or could I buy this?
http://shop.ehobbyasia.com/shs-m110-...de-spring.html

Id rather go with a 110 spring but I'll have to buy some "no name" one from this website.... bad idea? Im buying a battery so I thought I could save shipping and buy a spring as well!

There's linear (regular) and non-linear (irregular) springs. Regular springs have all the coils spaced out evenly. Non-linear have sets of coils bunched closer and further apart. Some have a tight pack of coils at one end...some at both ends...some in the middle...and combos of all that.

The purpose is to impart a different power curve as the spring is untensioned. Different power peaks, different timing of peaks, etc...

As a rule of thumb...when installing a non-linear spring, install the tightest pack of coils towards the rear (i.e. spring guide end) for the most power.

All springs are not created equally. IMHO it's worth going with a recognized brand.

Sorry about bringing back an old thread (but it shows I did search ;)).

I have a King Arms M4 which I needed to downgrade to below 400 fps. I was told that I could install a M120 spring (non-linear pitch) backwards, with the tigher packed coils to the front. This would effectively give me the same fps as a M110 spring (which the store didn't have in stock). So, I tried it. With the M120 spring (ICS brand) installed correctly, the gun shot at 420-430 fps. Reversed the spring and it still shot at the same 420-430 fps. So, any ideas why my experience differs from the information that I was given and also the info that I found on this thread?