I heard that a new hopup bucking helps to increase the consitancy of your shooting for little money. I have a stock JG G36K, what brand and which one should I buy? How do soft, hard or very hard buckings effect the shooting?

Brands? Madbull, Guarder, Systema, Prometheus

I've used all with success. Sometimes you have to test different ones, though.
My UMG does great with Madbull, my P90 hates Madbull but loves Guarder, my ICS likes Systema and Madbull but not Guarder. I know, it's wierd...

As for hard vs. soft, hard buckings are for higher FPS setups (350+), soft buckings are for sub-350 FPS. This is a general rule of thumb, though. Some have other theories, but this appears to be fairly common accepted school of thought. I run hard and 60-70% buckings in most all my guns.

Sparky has pretty much summed it up but he didnt mention the amazing brand that is FIREFLY!!! By far the best, it uses a V shaped hop and puts backspin on form several angles. However they are hard to find D:

munchflo, last active 6-9-09 "post date 1-5-09"

But whatever. I use the guarder 70% and I am very pleased. I also hear the systema bucking is even better. Prommy buckings are supposed to be amazing, but the problem is with the hard one, its too hard. Unless you tephlon tape the hop up, a lot of people have seal issues. But its an easy fix.

I have used systema buckings and they are sturdy like a rock, anyone know where to find a firefly bucking? (yes i know this is an old thread)

Airsoft Atlanta was the last US site I saw that had(s) them in stock.