The new 300 Blackout ran great. Locked back on empty. Fed great from a melted Pringles can lid, M3 20 round PMag (10 rounds) and 20 rounds from a 30 round Gen 2 Pmag.
Carry gun mag got a spring cleaning. No problems, even with all the lint on the gun. Also ran a Pmag that had been loaded for 2 years. Fed great in the 11.5. It locked back every time with the lighter BCG. That thing must have a small gas port- it runs the best with a carbine buffer and AR-15 bolt carrier. The M-16 carrier is in the Blackout now, no problems with it at all.