User blog comment:MrPacheco101/Final Round: Black Mask(Roman Sionis) vs. Spike Spiegel/@comment-422690-20100919235652/@comment-422690-20100920003125

They're both variations on the Heckler and Koch MP5. The A-whatevs don't mean anything except the stock. They're the same gun, just the A2 has a fixed stock and the A3's is retractable.