Most of your kills came from you up in the SEALs face and firing. That's not that hard.
I'm not saying the 552SD sucked or anything because I used that gun a lot, but if you want to prove to someone who doesn't like the 552SD, at least pull off some cool tricks to wow that person.
PS: Quality of the video was sooooooo horrible. Couldn't really make out anything without gouging my eyes out and shoving them onto my computer screen.