I had access to two Kratos 22 caliber rifles. One would not fill no matter what I tried as described in my previous post. I called Crosman and they were very helpful, a call tag has been emailed for gun #1. The second gun filled using the scuba bottle method. I scoped it up and fired 24 rounds threw it. The chronograph show the first shot at 990, the last shot 910. Still had plenty of air left. I then decided to refill the gun using my Hill Hand pump, no problems worked like a champ. Later in the week I will head outdoors and check the accuracy. Although I had problems with Gun #1 I think they are probably a good gun for money. There is a small problem with air fill issue, but I am sure Crosman will address it.