My suppressor should be coming in soon and it's time to start playing with the 10/22. I'm wanting a .920 bbl for it, but unsure about length. I can get a 16" or 20" for the same price. Is there any benefit to going longer than the standard 16"? I've heard that the 20" barrel causes a drop in little velocity, but does anyone know approximately how much? This could be beneficial if it would allow me to run standard velocity ammo and keep the crack to a minimum. I also want my son to learn how to shoot on this, and the lighter, the better. Anyone have any recommendations?