I finally received my Superlative Arms "bleed off" piston kit and got a chance to do this video. I will take it out next week to test fire and do some muzzle velocity studies to see if the bleed off has any negative effect on muzzle velocity.

https://youtu.be/HeKg0y628Bs

Looking forward to part 2.

Thanks! Great information.

Got out to do the field test. The "bleed-off" system had minimal change in muzzle velocity and a little quieter with a suppressor compared to restriction adjustments.

https://youtu.be/Cy5XLr3igaU

Great two part series.  Really appreciate the part 1 disassembly showing the bleed off system mechanics.

Part 2 shows this system is probably a strong upgrade for someone who shoots suppressed often.  Finally, less gas to the face, which of course is a problem even with most piston systems.  Should also result in less fouling in the receiver.

My only suggestion for part 2 is it probably would have helped to include restrictive vs bleed off velocity readings when suppressed too.

Ever think about running the same test with the DI bleed off version as a comparison?

Yes I have a DI gas block to test and review. When I field test the DI gas block I will try to remember to take out the piston upper to check velocity with the suppressor, restriction vs bleed-off. I'll include that information in the DI gas block video. Suppressed piston and DI velocities, restriction vs bleed-off, got it. Thanks!

Outstanding, well count me in.