That is a 5/8x11 to 3/4x10 so you can use 9mm accessories on the M11 380. Fairly common adapter, that knurled black oxide unit is available from FTF.Male threads are the standard 3/4x10....I don't know what the female side is. Just that it is 5/8 ID.
click the link or arrow over to see the other pics
Oh yeah you’re right. Must be 5/8x24, no idea what its purpose is, use 9mm MAC stuff on your 5/8x24 modern threaded barrels?It doesn't fit.....the threads are very fine
Nah no thanks I don’t have anything in 5/8x24 to put it on, thanks for the generous offer though. It is pretty unusual, somebody on here with a threaded .30 rifle may need ityou want it?
cover shipping
I am actually TOO weird for it, since having something with the modern 5/8x24 pattern would be too normal for me 😂minus you....I don't know of anyone weird enough to use it. I have shot 300 blackout through my M-10/9 can though and it was so quiet
he does i can vouch for thatI could put that to use......I doo weird stuff all the time.