Hey chaps, I brought my first gun and settled on a m14 dmr not everyones idea of a good starting gun but it suits my style and local site .. Can anyone shead some light on the fps? Some websites say 340 some say 400 and everything in between.. If its 400 I'm guessing I'll need a spring to lower it.. Any advice on this would be appreciated! It also has a large scope I wouldn't mind changing that to an acog what do I need to look for to fit the gun? Thanks