Sparks coming from the chamber...
on my AR. I was watching my buddy shoot my M&P15T and I swear I saw sparks fly out the chamber only once. I kept watching and never saw that happen again. I just tore the rifle down and everything seems perfect. Maybe just a bad round? Any ideas? Was I just seeing things?
Likely the gas vent holes on the carrier.
so nothing to worry about? never saw that happen before was why I was wondering.