Issues W/M4RIS System

[kmc0929]

I have a Noveske M4A1 style upper, Noveske permanently attached the FH. The problem I am running into is that these two little tabs inside the rail system have come loose (see photo). There is no way to tighten them, since the upper part of the rail cannot be removed. I guess its ok to just leave them loose?
http://oi44.tinypic.com/5wkphs.jpg

[FireandFlames]

Are you planning on mounting a m203/320? If your answer is no, then don't worry about it.

[GUNSLINGER733]

I removed mine. I don't think I'll be mounting a m203 anytime soon

[samuse]

Those things are annoying and they always come loose.

Take the allen head bolts out of the rail and it oughta come off or slide forward enough to get rid of the 203 tabs.