Ruger mark II with a weird "mod"

[Frack N Cylons]

Would also take it to home depot and try it with the 1/2, 14mm and 15mm pipe threads in plumbing

It's going to look sketchy but that's exactly what I would do too 😄

 

[NCLivingBrit]

Any oil filters that have a thread like that?

 

[Trevillian]

It's going to look sketchy but that's exactly what I would do too 😄

Already did at Lowe's. No luck 😆

 

[wired]

Its threaded for a silencer. Why would you want to "fix" it.

 

[starsea]

3 Easy Ways to Measure Thread - wikiHow

The thread is the ridged part of a screw or bolt shaft that allows it to be screwed into something with contrasting thread. Thread for both screws and bolts comes in different standard measurements depending on where in the world you are....

www.wikihow.com

 

[Get Off My Lawn]

Find someone with a tap & die set, they usually have a pitch measuring tool, one for metric & a std one.