You can always have "another" primary that is CQB/CQC ready. Lower FPS, lighter weight, more compact, etc. There's no harm in it, but usually you don't want to carry both at the same time. Even an MP7 or similar is more weight, more shifting around, and you'll find you won't bother switching over to it because really it isn't as convenient as it sounds. For a solid secondary I'd recommend a good quality pistol. Pistols are quick, light, easy to maneuver, and can be a great indoor or CQB/CQC alternative to an SMG or machine pistol. Drawing around a corner or even drawing indoors is very quick and easy with a pistol, and your profile stays quite slim. They can be handled with one hand if needs be as well, just generally easy to wield. Perhaps your primary is too long/big for you and you may think about going to a better manageable variant, such as an M16 to an M4, or an M14 to a Socom, etc. The other alternative is to get an SMG or CQB style weapon instead and bump up the FPS, put an aggresive hop-up in it, and try heavier rounds. Barrel length doesn't always help with shot distance or round stability. But wether I was carrying a rifle, and assault platform, a sniper rifle, an SMG , an LMG, or really anything, I'd carry a solid pistol with me.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē