Delta-cod
Smash Hero
For the MP5k, I've found that Extendos are the better attachment. Rapid Fire really hurts its ability at some extended ranges that it is very capable in if you're using Extendos. Rapid Fire has actually caused a good deal of my deaths while using it and trying to hit someone behind cover or at a decent distance. The close range benefit isn't worth anything because the MP5k rips through people at close range regardless.
Basically, use Extendos for the better aiming and range capability. You can single/burst fire an MP5k to kill quickly at extremely far ranges without Rapid Fire.
Basically, use Extendos for the better aiming and range capability. You can single/burst fire an MP5k to kill quickly at extremely far ranges without Rapid Fire.