Just posted this over on the .50 cal section, but since it is a bullpup...
What's the diameter and TPI on the DT HTI 50 barrel extension? I can't find the thread pattern specified anywhere, and I don't have an extension handy right now.
I wish I'd thought of this during their regular business hours, but free time to spend in the shop can be irregular and unpredictable.
They did indeed get back to me.
M36 x 1.5
maj dia 1.416-1.407
pitch dia 1.378-1.372
length 1.065 +/-0.005