MG3 Flash hider on M53

[wizzegun]

I've been trying to put together the .308 conversion parts for my M53 SA. I tried threading a MG3 flash hider onto the M53 but the threads are different. It won't even start. They appear more coarse on the MG3 FH. I assumed (yes I know) they were the same. Is that correct or did I found the one-in-a-million FH that doesn't work?

Thanks!

[Sd.kfz.173]

wizzegun, my mg3 adapter threads onto my m53 fine , you may have a oddity,but as I aint an expert, you might want a smarter opinion


Bill

[drooling idiot]

never had a problem with any combo i've tried, a lot.
look for a burr maybe ?

[wizzegun]

So after borrowing an old crappy pitch gauge, the pitch is the same. But the gauge would not sit into the starting thread of the MG3 FH. The thread is tighter. It almost looks pushed in on itself but it's uniform. It starts but only goes about 1/3 rotation and stops. The M53 FH spins on like butter.

The optical illusion of the coarser threads is the MG3 threads are much better defined and go deeper into the FH.

Thanks for the help. I figured it was on my end but needed to ask.