Basically the gun would function like the XR-2 assault rifle from CoD: Bo3 or the SCAR from L4D2 which functions like this: Holding the fire button down the weapon fires a burst after a burst, with a very short cooldown of 0.20-0.30 seconds between the bursts.
This weapon would improve the Ranged weapon variety for the Veteran, Psyker and the Zealot.
I’ve been wanting one for a while. Although in my case what I really want is the benefits of the Infantry Lasgun without the joint pain and without the need for the mod (autofire bugged out on me last time i used it)