Gunsmithing AI Muzzle brake thread pitch?

[S1erra1]

Can anyone tell me what the left hand thread pitch is on the front of an AI suppressor compatible brake please?
My Google Fu has failed me.
Thanks in advance.

 

[jet_lagged]

Should be M18x1.5 (mm)

 

[DAVETOOLEY]

M18-1.5 is the muzzle thread not the thread on the OD of the brake.

 

[S1erra1]

Yeah, as Dave said, 18x1.5 on the muzzle but the front of the brake has a left handed thread which is what I'm after.

 

[FF05]

The suppressor thread on the AI Tac brake is LH M18x1.5.

 

[S1erra1]

The suppressor thread on the AI Tac brake is LH M18x1.5.

View attachment 7247303

Thanks mate, appreciate it.