It looks like it is a single shot bolt action rifle. I am not an expert but I don't know what that stuff is under the barrel. Is it a muzzle loader? The stock looks real nice though.
I know perfectly well what the rifle is guys. Just wanted to see who here would also. It's a Quackenbush Long Action Outlaw.458 cal air rifle. It'll produce 500-600 FPE for two shots before recharging from an SCBA tank. Grade is 'Select' with a laminate stock. Got on the list and waited more than 6 months for it. He doesn't produce many more than about 50 rifles per year and are very desireable in the airgunners world.
If you'd like a high quality adult air rifle look at the Air Arms S410 series. A lot less expensive than the daystate line. Very popular. Very accurate. Great for hunting or target.