CB5 is a good gun, They last FOREVER... it feels like... They are very good guns are are cheap.
Well, it depends I would sell the gun and use it for ped to buy a new gun/ammo. And use that to keep moveing up the ladder. Its going to take a long time to become eco with that gun. or any un (L) gun for that. (with the excpetion of a few guns)
However, some would say keep that gun and ONLY...ONLY USE IT WHEN YOU HAVE TO! hehe,
... The reason for that is if you ever run into a guy that you cant kill whip out the big gun.
However to tell you the truth. When you get up about a few guns in the BLP range they get better then the GDC-97. IE CB19 or the GEO. Both good guns.
So me personaly... I would sell the gun and team hunt with a friend useing
CB5/opalos and just go out and hunt some smaller guys that you can take with out armor, such as Corn (good spot N or argus or W of Caravan) another good mob is Snark, and Molisk, if you get a few more people all with Opalos and CB5s you can take on Argos at Twin or South of Had as well.
Remember the (L) guns have a SIB. so that will help you in your skilling process.
Boo Who You