The Knights Armament End Plate QD Swivel Mount (Part No. KM24103-1) is way over priced and obsolete. Now there are QD endplates that are significantly cheaper and get the QD swivel in a location where it doesn’t rub against your hand as much.
That said, I absolutely love the look of this old part when used with a Magpul CTR stock.
Long ago, in some of the M16 chopped down to be survival rifles, and KAC also produced some pistol grips where an A2 grip was cut down. I had an extra A2 grip that was in really bad shape so I tried taking it to the band saw and the belt sander and cut it down a bit.
The smooth short grip allows me to choke up higher on the gun. For a smaller light weight set up like this pistol it gives a good bit of control over the gun. I like it.
But much to my annoyance, there was a little void in the plastic where the A2 nub was. So now that it was ground off, there is a little void in the front of this grip. That is going to annoy me as long as I use this grip.