You are putting words in my mouth. I would not really recommend the fire bolt because its mass is not all much smaller than the stock. The rev is a great upgrade to invest in. I have both of these upgrades installed in my eXTCY. It is nice being able to cycle the gun fast, but I only go to 12bps anyways (field limit/ cannot afford any faster
If you are thinking upgrade on the bolt, I would go for the L7. There is noticeably less kick with this bolt. It makes the gun shoot smooth.