If it's a new VSR-10, there are a couple things you'll have to do, especially if yo uplan to ever upgrade it. First is to cut the stem off the cylinder head nozzle, that is the airbrake, and let's say you put in a 400fps spring, because of that thing you'll still be shooting around 330fps. Next, there is a pin holding the cylidner head on, you'll have to drill that out in order to get the head off. I've never done it, but a few buddies have had to deal with the gun.............. literally, Amos is the guy to point questions at..... if you can get him to stop taking pics of his hands for a couple mins.
