I have a gsg 522. Im thinking about putting it up for trade. But I'm a suckered for cash to. Here's my problem. I've been looking around on line to make sure I'm ripping every one off equally and l can't seem to figure something out. I know that they made 2 different versions. One with a small diameter fake suppressor and one with a large diameter. What is the difference in the 2? Is one more valuable than the other?