Ok so the inner barell that came with the gun is aproxamatley 511 mm. Can anyone tell me if this sounds right for a bar 10 and where i could get a tight bore that long cut for bar 10. Im kinda new to airsoft and this is my first gun trying to upgrade. I have upgraded everything on this gun and the inner barell is the only thing i cant figure out how to fit properly, i have been told by a few different people that the barell doenst need to reach the end cap. Does that sound correct cuz it seems a little odd to me to think that there will be a 3 in gap between barell and cap. Please help any feed back is better then none.