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3/18/2026 11:06:59 PM EDT
[Last Edit: Zhukov][Edited]
Many years ago, I built a can with stuff from SDTAC, and I have two of their muzzle brakes. Does anyone remember/know what the thread pattern is for these? See picture below...


Daddy loves you. Now go away.
Ruthless ruler of cubicle B300.2C.983
3/19/2026 11:43:32 AM EDT
[#1]
They're a stub acme thread.

I made some adapters for one several years ago, if I can find my notes I'll post what I used.
3/19/2026 11:55:37 AM EDT
[#2]
Quote History
Originally Posted By blwngazkit:
They're a stub acme thread.

I made some adapters for one several years ago, if I can find my notes I'll post what I used.
View Quote
Thanks!

I assume it's something proprietary that doesn't fit anything currently on the market?
Daddy loves you. Now go away.
Ruthless ruler of cubicle B300.2C.983
3/19/2026 12:19:08 PM EDT
[#3]
Nothing I'm aware of.
3/19/2026 8:39:09 PM EDT
[#4]
Notes I have (from 2014) are a non-standard 0.810-12 ACME Stub Thread.  Using that in a thread calc has given me fitting parts.

https://eicac.co.uk/stub-acme-thread-calculator/

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