Love mine runs flawless, never had one problem with it so far, around 600 rounds through it. I run it mostly on my DD MK18 lower with a Geissele SSA-E trigger.
I have never had a double feed or malfunction at all yet, I am using cheap 10 round AR Pistol mags I paid $20 for, but I only shoot new factory brass case ammo
One of the best bang for my buck purchases I have made so far, It runs just as good as other $1000-2000 AR15's uppers I have
Id buy another PSA product after this experience