3 mag dumps, 90 rounds in about 90 seconds and the rail was on the edge of being intolerable without gloves. About half way into my 4th mag, I had to put on my gloves. This was with a pencil barrel. My 13" rail wears an AFG and I was able to shoot 4.5 mags at the same pace through a Centurion LW barrel before I decided to stop and cool the gun. The meat of my left hand and thumb were getting kinda toasty by then but if I switched to just holding on to the AFG and rotated my had so it wasn't wrapped around the top rail I could have gotten away with more rounds before needing gloves.

