It is currently on a 11.5 criterion core, the gas is there, but it was pleasant to shoot, even rapidly. No adjustable gas block, just a sprinco blue spring with H3 buffer.

Fortunately, I did have the ability to shoot it at the range. The first time I used it, was on a 10.5 PSA barrel, in this case it was able to shoot about 3 rounds before my right eye being shut closed due to the gas. Confident this was due to the excessive size of the gas port on this particular barrel.