I just wondering why you'd want to do it in first place? If you have a functioning sidearm and no leak in your mags, you are good to go. You don't have to have a pistol that shoots 490 FPS. I know some like the "realism" of a metal slide and more recoil and so forth, so I guess that justifies it for some. To be honest, you probably will use your side arm less than 5% of your skirmishing time. This rules out things like pistol matches, cqb and the times when you run out of mags for your rifle and have to switch of course....
Agrees.
I would not recommend upgrading your recoil spring, gas release valve, or hammer spring.
For one, you're gun will experience cool down MUCH faster, even here in Az.
Second, slide lock will most likly become disabled due to faster cool down.
Third, you won't be able to finish a mag.
You'll get hard hitting shots for the first seven or so.
After that it's all downhill.
I'm selling all my GBBs (Haven't treated me the best), and then I'm just going to purchase a reliable NBB.
-B00M!