I bought a barrel from Benchmark in 6.5 creed for my German SSG3000 and love it. The best thing is that it puts 5 shots of 6.5 American Gunner into easily 1/2 MOA groups at 100 yards.
Re: Geissele vs. Timney triggers
The Geissele is combat proven. I have both but I like two stage triggers and trust the Geissele more though I not had any issues with the Timney.
Re: stippled my M&P Shield 40........
Looks great!!! I know some people do not like the thumb safety but I've found it to be very well designed. It is there if you want to use it and doesn't get in the way if you don't.