Phenoms dont HAVE a sear.... Nor do they "cock". So I'm confused. You're dealing with a blow-forward spool, similar to a 'Mag. What happens when you turn the selector to mech mode? Anything?
Sounds like the reg might just not be turned up enough. I'm not sure how you adjust that as I've never dealt with one either but I know their valve is similar enough to a TPX. Follow the manual on Tippmann's site and you should be able to figure it out.
Last edited by PistolRogue; 03-01-2013 at 02:15 AM.