gun suggestion: bloodlust

[Crypt2c]

I'm thinking of a huge with pretty good stats. Its suffix would be "every time you deal a killing blow with this gun, you gain 15% increased movement speed and 15% damage, with damage stacking up to 75% and speed capping at 30 for 10 seconds. Each time a stack is applied, the 10 seconds are refreshed. When the buff wears off, the user is healed for 20hp per stack, and reloading removes all stacks.

Too complicated or do you guys like the idea?
Thinking of calling it bloodlust