KWA SR12 FPS Upgrade?

[captainkirk05]

I just recieved the newest generation KWA SR12, and according to Airsoft GI, it shoots 396 fps with .20g. bb's. I am looking to get as close as possible to the 400 fps w/ .25g limit for AOSC games, to maximize power but still have the ability to go full auto. At the same time, I am avoiding any upgrades that could be detrimental to the impressive accuracy it already has.

From my little bit of research, it seems a switch to a M130 spring has been the common practice. I'm not super modding this thing so please no one reply with crazy "frankenstein your gun up" answers.
So the million dollar question is:
1. What spring do you recommend to reach 400 fps with .25's? ( >400 fps is not acceptable, unless the spring is known to settle down enough over time)
2. Is the stock hop up and bucking sufficient for the increase in fps?
3. How will an increase in fps from the spring change affect the accuracy and range?

Educated opinions/experiences would be greatly appreciated.

[Star_folder]

1. Almost any M130 spring should work for you. If I had to pick, I'd get an SHS M130, they are cheap.

2. The bucking should be strong enough for the increase in power.

3. An increase in FPS won't do much for your accuracy and range. Your accuracy should be the same, your range will increase a little bit.

[captainkirk05]

Ok thanks for the reply. Since reading a few more forums, it appears that M130's push the FPS to at least 415 w/ .25 (I've heard the KWA M130 is weaker though???). I think I may see about changing to an Edgi or similar brand 6.01 tbb and see if that pushes me closer to the goal while keeping me under 400. Otherwise I just have a lower powered semi only DMR.

[Vesper]

An M130 spring should put you around 380 FPS with .25s, unless you're using a Madbull M130 spring; Madbull chronoes their BBs with .25s. A brand new M130 spring MIGHT put you over 400 FPS with .25 BBs, but that should only be for a short period of time until the spring sets in.