How to tune a marauder?

As far as tuning the Marauder, the beauty is also the booger. Be patient follow the guidelines in the previous post. If it doesn't work out as well as you like, ask in the forums. Everybody is an expert. That's the beauty part, the booger is that you could very well like a variety of settings, and end up wanting to maximize your efficiency/power to every different environment you shoot in. That's quite possible, and doable. I call it a booger cause something could always be a little bit better, and sometimes I find myself more engrossed in tuning than shooting. You've been warned. :)) Have fun, good luck.
 
This guy does a fairly good job on the parts and what they do.

https://www.youtube.com/watch?v=ZGzVauRdBr4

In tuning also look up Bstaley oring modification. And before you adjust anything be sure to record your factory settings before you set out on the quest for the perfect tune. I would buy or borrow a chronograph and record several shot strings for velocity and accuracy. You just might decide you got the best tune from the factory.