Something in the air?
Two AR15 KB threads. In the first one, our hero was using a PMAG; the downside is the PMAG turned into fragments when the gun exploded. I hadn’t thought of the failure mode for polymer magazines when I bought my PMAGs; I won’t stop buying them, but it will be in the back of my mind. Apparently HSM ammo was the cause of this unplanned excursion into “parts raining down on us land”.
The second KB is the most impressive KB I’ve ever seen in an AR15; it looks like a grenade went off in the upper. Our hero was shooting S&B ammo; looks like he’s OK, thankfully. Of note is both of these guns were essentially brand new.