Tonight I took my new PC Carbine out for a few rounds at my local indoor range. FWIW I did not shoot past 25 yards as that is the limit there. I shot around 200 rounds of Winchester White box and Federal 115 grain ammo, and had zero failures to feed when I used Glock mags. Pmags just would not load a round period and ECK Mags worked but eventually failed too. I had read that this would happen, and true as told, it did. Again Glock Mags were flawless. I did not use the Ruger mag at all. I had a cheap red dot on it and shot holes within holes. I forgot to bring my tool for adjusting the ghost(?) sites, so will do that at a later date. I loved the gun!