Never have shot one, but handled one, didn't notice any rattle............it takes 12 rds. in .40. but will accept full size mags in 14 or 17 rd.

I have a cx4 .40 and 2 px4 subcompact .40 and I love them all. The sub has 10rnd mags and the compact has 12. The full size comes with 14 like my cx4. They will all except all the bigger mags. I can put 14 or 17 round mags in the subcompact. Lol. Had to try it. The guns themselves don't rattle. Every once in a while you'll get a rattle in so e of the mags when there not full loaded. But the mags can be fully disassembled and look over. I just haven't taken the time to work out a fix yet. But I only have 2 mags that do that out of 12 differ ant mags of all sizes

Very wise decision indeed. In my opinion a great CCW, and a very, very, good shooter. You will probably only see the DA/SA, type F version which in my opinion is one of the best DA pulls out there, short, light and crisp. I can honestly say unlike other DA pulls I can shoot the PX4's DA as well as the SA.

I saw the same video you likely saw with the pistol rattle. My PX4SC and four magazines. None rattle when loaded in my pistol. I am not sure what is wrong with the pistol in the vedio, but if I were the owner I would call Beretta and ask them. I am sure it's an easy fix the owner can do, if not I would think Beretta would take can of him in their usual first class way. Mine is flawless as far as a man made object goes.

Vv

I saw the same video review where the handgun rattled. I shot my px4 subcompact today for the first time and used 3 different ammos and had no problems while shooting 120 rounds threw it. I tended to shoot low and to the left but had nice groups. Mine does not rattle with an unloaded clip in and seems well put together and tight.