Tippmann E-trigger = The e-trigger is probably the best upgrade for your tippmann. Unlike the response trigger it has an extremely light trigger pull. A TON of features like 3 round burst-full auto- programable BPS and debounce. I have had mine for about 2 months now and it is the perfect upgrade for me and others. Tippmann Cyclone Feed = The cyclone feed is the perfect upgrade for your tippmann. I can hit 17-18 BPS with it. People say I want to get a Halo or an Evolution hopper so I can shoot 21 BPS. I doubt that those kids can shoot that in the first place and 2ndly Id rather have a system that I can clean out easily and that wont break. This is why I chose the cyclone feed.