I don't think I would have much luck in the EE and almost consider this more of an armory/general SAN Swiss 55x question

I have an mike otte 3 prong and a sig sauer 3 prong that came on their stock of 553 if anyone wants to trade?

It's # 7 on this list from Swiss Arms.

These actually came in on the 553 Pistols imported into the states with 1/2X28 threading. These were originally available to the Malaysian military

PASKAU on their 553 SOW that also had 1/2 X 28 threads

So if anyone knows an importer here in the states who can get me some of this stuff or has one available please let me know!

I have ordered a few things from wolverine supply in CA but they wont help much with the other things...