I don't have any +0 versions but the Pearce +1 and +2 models work reliably on my G27 mags. My only complaint is that it takes time before you you can force in the extra round(s). The extra grip space is great. To me the +1 is "just right"! (So I moved the +2s to some G22 mags, and sure enough, still only one extra round!)
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek
I'm trying to find out if the pearce +0 grip extension will affect reliability the way i've heard the +2 and so on do. Does anyone own some and do they work right?
I don't use any right now, but I have used the +0, +1 & +2 extensions in the past with no problems whatsoever. As a matter of fact, the Pearce extensions are the only ones I trust other than the factory extensions.
The ultimate aim of martial arts is not having to use them
― Miyamoto Musashi
"The only gunfight won is the one avoided."
― The Rukh
"Ignorance is treatable - stupidity is terminal."
― The Rukh
I don't use the extensions because I do pocket carry my G19 a lot, in fact most of the time. The magazine extensions would snag in my pocket. Pocket carry is the number one reason I chose the G19. I shoot the M&P 9 better but it is not pocket friendly. In SD range there is no difference in a 3" group and a 2" group. What does matter is having an adequate gun with a decent capacity on your person.
Nothing in the affairs of men is worthy of great anxiety - Plato