This gun fires a tube at a time. Not one pull two booms. No option for that either. It also does not allow alternating tubes or single tube feeding. One pump, two goes in. The complicating thing is it introduces a new manual of arms since you have to train yourself to pump once, shoot twice. For all of us who are used to the pump once, shoot once shotties, this will take some getting used to, especially under pressure. The short stroking issues are typical of the bullpup types like the KSG and UTAS. When you have so many rds, you tend to go crazy and pump them out too fast leading to short stroking issues. The rep told me these are more reliable than Keltec's but I would take that with a pinch of salt. Actual usage and time will tell.