With many thanks to Slither this was crafted today:
Click to enlarge
To summarise
Full tt is 4160 peds
48 attacks, 7 ammo, 36 damage, 18-36 damage interval.
I have done a few decay tests and it comes out as 1.819pec per attack, with 7 ammo fired and 36damage, it comes to 4.08damage/pec.