I would like to say that I also have several of the PMags, plain black and tan with the window, I am very impressed with them. They work as they should in my 2 bushmasters.
I have to add, that I have never had a problem from my bushmaster brand mags either, but the PMags are less expensive, and have the cool dust cap.
I buy 1 or 2 every time I order stuff, I will at least until I have 15 or 20. You never know?