Both, I had shots where I pulled the trigger and got the click but it did not fire, I ejected the round and it was still a live round a few were emptied rounds. A few others were double feeds or at least it seemed that way bc the bolt would stop half way and there would be a round in the chamber and one in the breech. Im honestly not 100% sure. Im going to take my time and do some tests this weekend and see what happens.
I have a thread in the AK/AR Class III section discussing my woes with the MSAR. Turns out the Monarchs had some bad ammo here recently and that almost makes sense for me since I had some fairly old Monarch rounds that I never had issue with and then a few boxes of the new stuff that Academy yanked from the shelf. Luckily I have one box of the old stuff (its in a baby blue box) and one box of the newer monarchs (red box) that I get to test this weekend. Im going to pick up some quality rounds as well and try all three and see how it goes. My issues with firing and feeding were out of three of my 5 mags Im thinking the 3 bad mags had the newer junk monarch rounds and maybe that was causing all my issues.