Awhile back I bought a used c9 with some deep gashes in the slide and a broken rear sight. I've done the mag lip adjustments and feed ramp feels smooth,yet the or 7 round will stove pipe almost always with out fail. So now I'm ready to send it back for repair. I will be using an FFL, so shiping is not an issue. My question is what besides description of problem, the gun(duh!) and mags do I need to send in? The most effective way to stop a shooter is to shoot back.