Does the SOCOM limit add on "options"?

I have only recently started browsing the forums and think i picked up somewhere along the way that the SOCOMs shorter barrel limits the ability to install other things later on. I apologize, but I say "things" because at this point i dont even know what you would install...scopes? flashlights? muzzle breaks? flash suppressors?
Other things?

I am concerned about the future versatility of the shorter model i guess.

Thanks 8)