I'm new to these forums and this is my first post.
I have been reading the forums and looking at some of the excellent work done by Kurt.

Now I am considering a 6.8 spc piston upper,but I still have a few questions for Kurt and the guys with the 6.8.

1.Ease of cleaning/disassembly of piston assembly,and time involved to clean it..start to finish.

2.Accuracy/performance with all types of ammo.
Barrel spec 2 with 1 in 11 twist may be best setup for me.
(300 yard+ info would be great! because some systems induce strange barrel harmonics.)

3.How is the adjustable gas flow/block coming along?

I am not a huge fan of di gas systems..but I don't want to hop on the Masada/Scar band wagon just yet.

Kurt,good luck on the CNC upgrade.

Simple! See the article in the top menu bar on my M9EvoM4 in Special Weapons. Paul describes it.

"2.Accuracy/performance with all types of ammo.
Barrel spec 2 with 1 in 11 twist may be best setup for me.
(300 yard+ info would be great! because some systems induce strange barrel harmonics."

Accuracy is not affected. I'll know more whe I get these 2 6.8's in here finished up.

3.How is the adjustable gas flow/block coming along?