I have a Gen 2 Marauder that I have replaced with a Gen 1 that has already been tuned. I got this off the classifieds and set it up in a Vit Bullpup stock and shot it indoor at 10 meters. We are not shooting indoor anymore so and I have found a tuned Gen 1 that I am shooting, so it it time to thin out the herd. I took everything back to manufacturer settings then using the port turned the power down to around 10 fpe for indoor. $350 shipped PP F&F or you pay the 3% fee.