For 8 years I have shot .177 Discovery, .22, .25 Marauders and a JSAR .22 non-regulated Fortitude which is my favorite. They all have served me well and still do, however its time to do some thinning and move over to the dark side of regulated guns. I have a 4500psi air tank which I get filled locally at Scuba World here in Camden DE. Pesting is my main objective, mainly nuisance birds on farms. Looking for an ACCURATE, regulated .177 that's trouble free. I will be purchasing new. Thanks for your help.