When something goes wrong with your shotgun, the last thing you want to do is hesitate. Fixing a malfunction quickly could mean the difference between winning or losing — between living or dying!
There are three basic pump shotgun malfunctions: stovepipe, failure to extract, and failure to eject. As with all malfunctions, they can be caused by a dirty weapon, a weapon with a bad or damaged part, shooter error, or even bad ammo. Thankfully, because it is a pump shotgun, you can clear these malfunctions rapidly and stay in the fight.
Read more at guns.com