Sling swivel size, European

[Of001]

So, I'm short QD sling swivels for my mauser m12.
There are 3 studs, rear, front bottom (bipod) and front forward.
The bipod stud is standard but the other two have smaller then normal holes. Is this a euro standard?
What is the size to search for?

I can't find anything in the manual or specs document.
I'm not beyond swapping them out to flush cups but I would like the cheap option

 

[Dean2]

Most European swivels are not quick detach.. They usually have a small threaded screw that attached the swivel to the stud. The swivel is threaded on one side. Easiest option if you want QD is to replace the studs with regular Mike's studs, flush cup pop outs, or order the detachable swivels from a European outlet, or thin down a stnadard Mikes.

Standard European swivel.

 

[Dean2]

Your welcome.

 

[Of001]

I'll see what I can find for just the swivel, I don't mind it being threaded.
My last option is swapping out the stud, it's right on the end of the forend, almost inline with the barrel and I don't see there being much meat to mess with.