What mtndragon said is true, but I think you chose well for a first gun for a couple of reasons. First off, the Marauder still comes with a steel tube and is very front heavy for it. Second, you will be able to play around with tuning much easier with the Avenger and learn how that works. Third, not everyone's Avenger leaks or has had problems, that was his experience and might not be yours. Have fun with what you got and learn. Lastly, don't be too concerned about dropping money on DonnyFL products, you can use the suppressors on every gun you get down the road and all his stuff has resale value. You might want to get a Marauder later too, there are good reasons Ike mtndragon listed to do so. I love my Marauder, but only because I changed out the steel for aluminum and did some other stuff to it but I don't have the shot count of my brother's Avenger either. So in comparing them you have to consider how important shot count is to you too. A cheap scope that works well is the Athlon Talos 3-12 mildot, or the Tac Vector Veyron which you can get either in FFP or SFP.