M13.5X1 left is the thread on OEM 9mm threaded Glock barrels
Anyone make a comp for this?
The Arc comps are available in that metric thread, and even though I have one on a BBC 17 build that’s underway, I’ve never shot with it but I’ve read great things about them.
Another option, there are a few companies that make a standoff device for glocks so the slide doesn't go out of battery when pressed against things , it fits on the rail and covers the muzzle.
check out the tri delta custom muzzle brake, available in metric thread.
nice compact design & pretty effective.
Mine is not metric
M in M13.5x1 stands for metric (possibly millimetres lol).
And a factory threaded Glock barrel in 9mm has a M13.5x1 thread. Except Gen5, those come in 1/2x28 as well.