I’ve got about 6 myself. I also have a couple of the PSA mags. They seem to work well and are solid, but I know at least one of them doesn’t always lock the bolt open on empty. If your pmags are brand new they may give you a little trouble at first. It seems to me leaving them loaded up over night seems to help that though!Yeah I grabbed like 6 of the 35 rounders from Magpul lol. Didn't want to mess with the PSA mags or that other brand that starts with when M, can't remember, but they had some feed issues. It seems like it's going to be fun. I kinda want to SBR it so I can put a decent stock on it, folder brace is cool but bleh.