Both my AR15 and AR10 version are tight, I had to use a screw driver to pry them loose.
I thought about getting rid of it, but it does provide a "toe" for the support hand to hold on to better than if it weren't there.
I use the AR15 PRS on my AR10, the AR15 PRS's cheek piece is more usable, and I don't need to raise it to the point it would impede the charging handle. With AR10 recoil, that little cover never came loose.

