Folds, fits, fat, fails - JE Machine Tech 5 Position Adjustable Vertical Grip w/Storage Compartment

One star for folding. One star for actually fitting the rail. That's like a participation trophy.

It's fat. If you have big hands, this fits right in. Otherwise, the handle is wider on the left-right axis than on the front-back axis. Not a great fit for the palm. But it folds, and it fits the rail, and it fits in the hand, one way or the other. There's three stars.

Now, if you like leaving behind parts of your firearm at random places along the way where you might have firearm out, this little diddy has a feature you will love. The cap for the storage compartment is designed to fall out of the storage tube. Just strike the side of your hand downwards against a table or the other hand while holding the vertical grip and that little baby pops right out like a magic trick. But you're not the magician. Those magicians at JE programmed this trick to deploy when you least expect it, leaving behind a nice little piece of gun litter somewhere you probably didn't want to leave gun parts laying around.