[ptoguy]

On a .40 or 10mm ?
You mean these:

 

[Litigator123]

On a .40 or 10mm ?
You mean these:
View attachment 70345

THAT'S IT!! Exactly. .40 cal. They seemed just pined in there. One blew out and had the gunsmith drill a hole from the outside to weld it back in, but it popped out again. Where can I get these? They don't even seem to be listed with the flats or even full kits?

 

[ptoguy]

Try RCM or hkparts.net, if not, you might have to get a new trunnion and remove them.
Don't know if those are supposed to be replaceable parts or not.

 

[Litigator123]

Try RCM or hkparts.net, if not, you might have to get a new trunnion and remove them.
Don't know if those are supposed to be replaceable parts or not.

I checked HK parts - they don't have them. The problem (I think) is that HK doesn't use them (do they?) These parts seem to be unique to Coharie, if they are, no HK place will have them.