Nevermind, it was a visual issue on my end, the m4's/m16's are fine now and fit perfectly. although, it would be cool if an HLC AR config could be made and implemented somehow, allowing everyone to tailor the mod to meet their own tastes.
Say, a purely HLC (AK and AR) /HMMWV config and a seperate HLC/RH/HMMWV config?
Again, not an issue if this can't be done, the mod is perfect as is, but options are always nice :)