Bushmaster's XM-15 QRC (Quick Response Carbine) is ready to hit the range out of the box. The 16" Superlight contour barrel has an A2 Birdcage-type flash hider and is Melonite treated for longevity and ease of cleaning. It features 1x8 rifling for optimized performance with precision 5.56 NATO/223 Remington ammunition. The six-position collapsible stock gives the rifle an OAL of 35" when fully extended, and this model has a Quick Detach mini red dot optic.