I picked up a new-to-me Rock the other day and it seemed to struggle a bit with the Federal 40gr FMJ I had for it. No issues with light primer strikes or anything and it would extract and eject just fine but it semi-regularly stopped just short of going all the way into battery, maybe a millimeter or two out, and the trigger wouldn't reset. The slide would go into battery with a firm tap but the trigger would usually also be dead so I'd have to cycle it at least far enough to reset it.

I have some AAC ammo on the way, only bought Federal on the shelf out of impatience to try shooting it. Great pistol except for the part where it didn't work about 20% of the time Before I reach out to their CS about it on Monday, anyone happen to know if this is a common or understood issue?

I'm guessing it was a franken-gun because it has a black optics-ready slide with gold barrel that I remember seeing on sale a little whole ago paired with a lovely sniper green slide All the frame pins look fine, only light and expected wear on all the internals you can see by field stripping it.

I’m having a problem with mine as well.  I’ve only tried red box AE ammo. It Won't consistently cycle the rounds, as it will load, fire and not always load the next one.  Tried using my DA Mask and it was worse and it wouldn’t eject the empty’s at all?   Hand cycled fine…. .

Quick follow-up, it did have to go back to PSA, they replaced the extractor and had it back to me pretty quickly and it ran through my entire remaining supply of 5.7 ammo (a whopping 60 rounds ) with no trouble at all. Now my biggest problem is waiting for more AAC ammo to come back in stock

Thanks for your help though, looking forward to getting other folks interested in the cartridge too and I know exactly where I'm sending em to get one!

I ended up having to send mine as well. I think it was back to me inside of two weeks and they also replaced my extractor, and it runs 100% now!!!