So, I sent my 556xi lower to a gunsmith to have work done and the guy lost my hammer assembly. I have searched all over the internet and the parts are no where to be found.

Any ideas as to where I can locate the hammer, spring and pin would be greatly appreciated!

Gatewood Supply, gunfactory.ch, Gunbroker. Same guts as US Sig 556 or Swiss 55X.

Shootingsight produces a match hammer and sear. I have a set installed in mine.
https://shootingsight.com/?product=sig556

quote:

Originally posted by stormwalker:
Shootingsight produces a match hammer and sear. I have a set installed in mine.
https://shootingsight.com/?product=sig556

That is what I would buy.