Sig Pro - Black and White

[takealap]

I know this thread was made like two years ago but I'd like to build the silver sp2009 it looks so cool. Did you have to use a high flow valve to get it to cycle? I was thinking about using my glock 19 strengthened recoil spring if it fits but I heard that the hammer spring is too weak for a metal slide let along an enhanced recoil spring.

[Mr Jon]

The high flow valve certainly helps it cycle better. If you could modify an existing recoil spring to fit that would definitely help because the slide return is a tad sluggish. Too bad you can't install a better hammer spring in it. It's a slow performer over all of a gun, but it sure does look pretty!