[joker, the frickin ninja]

I have decided that I am going to get a sidearm in about a month after a little bit of research, but right now I have my eyes on the MP5K and MP7. Which do you guys think is an all around better gun, and please list pros and cons. Feel free to give me other suggestions, as I am open to them. I just don't want to get a gas gun because I kind of get tired of always buying gas and refilling mags.

Thanks in advance.