Had a squib in my Sig556 actually crack the muzzle. (Previous post), really glad it was not worse for you. Get out the magnifying glass and go over the whole barrel. Seriously. I had one of these.

Sucks. However, ammo, and as m25 posted, let them know. Sig did me right, even though warranty doesn't cover squibs. I'm sure Kahr, as top shelf as they are, should make it right.