[Roman_War_Criminal]

Based on the angle of that shell casing shown in the first picture and that it looks like it’s lacquer coated - I’d say that it’s a 5.45x39 casing.

Note the taper on the case - .223/5.56 aren’t tapered.

5.45x39 is even more lethal than 5.56 based on my experience with hogs/feral dogs.

[Afterguard]

“Based on the angle of that shell casing shown in the first picture and that it looks like it’s lacquer coated - I’d say that it’s a 5.45x39 casing”

Excellent observation! I believe you are correct.

[Big Red Badger]

So
You are suggesting

AK 74 ?

Agreed.

[Manly Warrior]

Disagree- not that it matters. Looks like a 223/556 case to me. The 545 has a much more pronounced taper and a base( case head) much larger in relation to the mount- the .473 head diameter and 242 ish mouth diameter of the 223/556 is much more even on ratio than the 530 and 230 of the 545....

Plus, the 545x39 is much shorter than the 556x45/223, making the skewed mouth to head relationship much more apparent....

223/556 it is in my somewhat intelligent experience/opinion.

We just need to see the picture of the platform and even more interestingly, pics of the wounds....

That is where the rubber meets the road, or in this case, where the metal meets flesh.