I wasnt ripped off i just found it lying around my shop. ill just pick up a new one when i get a chance. it still works ok i just dont like the idea of it leaking

The blowgun I used on my sprinkler valve leaks a little before i fire my launcher. took it apart and cleaned it out and lubed up the orings. its still leaks. Should i just buy a higher quality blowgun or do they all leak a little?