I have noticed that in the stores also. I always figured that someone pushes on one just to see what it is and it pops through, then if one pushes through they have to see if they can get all of them to. It looks like they just push in and out. From what I can tell I don't think they're even glued in.
I almost ordered the frame last night, but I just can't quite get myself to. I keep looking at the Knight and second guess myself. I worry about the recent issues with TC customer service and possible quality problems. It looks like the Knight Mountaineer is basically the same gun as my Disc Extreme except they claim to have fixed the major complaints about I had about it - the ramrod, the blowback issues with the breech plug and less tools to disassemble the whole thing. So... I just can't decide right now.