This is SIG .300 AAC Blackout 220-grain subsonic FMJ ammunition.

SIG SAUER subsonic rounds feature a 220gr Sierra Match King Projectile for superior accuracy and minimal dispersion when suppressed. Rounds are precision loaded using state-of-the-art, electromechanical monitoring for geometric conformity.

SIG takes pride in their Elite Performance Ammunition line, which is manufactured from quality, USA components.