The standard Katiba weapon (Katiba 6.5mm) than Carbine Katiba 6.5mm, Katiba GL 6.5mm, MX 6.5mm, MX 3GL 6.5mm and MXC 6.5mm.
In the virtual arsenal all of these weapons have the same damage, but shooting at the same target, with the same armor (GA Carrier Rig), all weapons kill with 5 shots. Except the standard Katiba 6.5mm, which kill with only 4 shots (exactly the same as the MX SW (which deal more damage than all of these weapons)
Even without comparing Katiba series with MX series, Carbine Katiba, standard Katiba and Katiba GL, that three weapons are the same base weapons with a few changes. {F26541}