I think ELS is a different course. I don't envy you doing the Police one, I have heard it's gash. FPOS is the qual below Paramedic, or so I am lead to believe, that's the only one that's current anyway. Certain Close protection companies offer FPOS variants as well.
It's honestly like people just throw stuff together and make up courses with a fancy name.
I wouldn't believe that about the Seals, I will be looking for articles now though. The Asherman Chest seals were alright and got replaced with the Bolin Chest seals and they were a lot better than a three sided dressing.
O2 isn't a prescribed drug either. So as far as I am aware you can administer that. But it has considerations when and when not to use. If you are trained, qualified and competent in its use.
A basic trauma kit or control kit for GSWs would be 2 FFDs (entry and exit) TQ, haemostatics(can't be used on abdominal injuries).
I have this argument with lads that carry the typical off the shelf FAK, they are suitable for very minor stuff of personal hygiene, not the best for trauma.
I don't want to start asking too many questions because I don't want to see a knee jerk reaction that ends up with ranges stopped or too impractical to run.