I've got the 92A1.

When I field stripped it I did not notice a small lever which fell out. Once back together it went full auto!

It was terrific fun but illegal.

I had to study the diagram when I stripped it again - it was then I noticed the missing part. I searched around with a magnet over the workshop floor and found the errant bit which I put back.

It is now fully legal again (only fired off the first magazine before repairing it).

I like the blowback of the A1 but can understand the desire for the greater accuracy of the FS.