What's the consensus on gas tubes that restrict flow?

[1168]

What buffer should I select? Running an H3 right now, but obviously want to get that down. H2 sound good? Iirc that's what Crane specified for use with the CQBR uppers.

Between H1 and H2, I don’t think it matters that much once the port is choked down. The same port size will likely run both. I would personally choose H1; you can always go up or down from there. Many here advocate for the H2. Either are fine, IMO. I smear a tiny bit of Griffin Horse Jipe high temp anti-seize on the tube and gas block when I install, in case I decide to change it after testing.

[okie]

Between H1 and H2, I don’t think it matters that much once the port is choked down. The same port size will likely run both. I would personally choose H1; you can always go up or down from there. Many here advocate for the H2. Either are fine, IMO. I smear a tiny bit of Griffin Horse Jipe high temp anti-seize on the tube and gas block when I install, in case I decide to change it after testing.

H2 was the standard buffer either issued with or recommended for the Mk18, depending on which version and who issued it, and how. They then went up to H3 as the ports eroded to keep the bolts from running too fast. Not sure how they landed on it, but the H2 was considered ideal for a fresh one.

[Clint]

Not at this time.

The EZTUNE gas tubes work so well, there's not much need for a gas block solution.

Are you planning on offering the micro-tune gas blocks any time soon?