Indeed, James Cameron seems to understand how to make sequels 
Unfortunately he didn’t do Predator 2 which is my other favourite franchise next to Aliens and Terminator. Every Predator sequel sucks compared to the original imho. Really do not understand how you can mess something as cool as Predator up so badly. Not even Shane Black managed to do it right and he even played Hawkins in the first movie. Also i think i will never be able to like a Predator movie without Arnold. Him and the Predator…coolest antagonists in history of mankind 
Anyways, i always get carried away when talking about my most favourite movies of all time.
So yeah, my PulseRifle only has two fire modes: Burst or Full Auto. The minimum number of shots i implemented is 4, since it’s the number of shots that are written down in the (fictional) specs of the weapon for burst mode. Since as far as i know no one ever heard a PulseRifle fire a single round and since i can not even imagine how a single shot would sound like from that weapon, i decided to go with bursts instead of single fire. A tap in full auto mode also releases a burst, bullet count wise as well as sound wise. And yes, i am separating into heads and tails for both burst and full auto. However, like i mentioned before, the full auto sound is a loop of a concatenation of bursts. This is subpar imho, but when i realized that even the guys from ACM (who had full access to the original movie sound recordings) were not able to implement a real full auto sound i gave up my hope on doing it myself.
However, if i were capable in DAW-stuff, i’d try to go down the following route:
I do have heads and tails already. What i am missing is the body of a full auto sound.
That said i do have a monotone full auto PulseRifle sound, which is however missing the signature pitch and flanger effects of the original sound, you know the ups and downs in tone, almost as if the weapon was screaming. So i would try to create several versions from that looping sound, each version with a different pattern of pitch/flanger/whateverisneededtogettherightsignature. Let’s say 4-8 versions of the full auto loop. One might go constantly up in tone, one constantly down, one might start going up and then down again, one doing vice versa, … Of course the modifications would not be allowed to change the tempo / RPS of the original full auto loop.
So in the end i’d have 4-8 varying full auto body pieces that i could use randomly in full auto fire of the weapon. Hope that makes sense anyhow, english is not my native language