I have one in stock , looks to be a very good for the price stock is a bit bland but at the price you have to expect that. I dont think you can remove the bottle it looks to be like the Daystate rifles with no valve in it . You fill it the same as the
Daystate the only problem is that you have to fill the bottle using the gauge on your tank, the gauge on the rifle is for the regulator pressure . I dont know how many shoots you will get this is will be down to the calibre and power setting ect., but it should be good looking at the size of the bottle. The trigger is good and its very accurate took it to my local club for people to try and they were impressed with it.