User blog comment:BlueChoco/Your choice for Mark II weapons/@comment-3161482-20110913060509/@comment-3161482-20110915172706

I didn't say all of them. I'm mainly thinking of the AA-12 Mark II, SG556 Mark II, and to a lesser extent the MP5A4 Mark II. I haven't tried the Skorpion Mark II yet though. Really isn't much reason not to upgrade your gun to Mark II.