No way that is/was a M-16 entry and exit wound!!! Sorry guys, not biting on this one.
It looks completely legit to me both radiographically and pictorially. The exit wound is large due to the bullet hitting the bone and fragmenting (the bullet did not miss the bone and the very strong distal femur does not generally shatter from shockwaves. Hydrolic shock from high velocity rifle rounds can break bone, typically ribs or other small bones but I don't believe that was the case here). The bullet fragments on the AP & Lateral X-rays are consistent with the bullet track shown in the photos and they appear to have struck and exited the distal femur along that track. There is no problem with the femoral artery. It is more proximal and medial (sorry..higher up and more towards the groin) and it bifurcates (splits) into much smaller vessels before the level of the wound.
A lot of manipulation, a distal plate and a dozen or more screws will fix this guy up. The tiny bullet fragments will be left in place. The wound will be thoroughly washed out (with a neat little high pressure water pistol called a Neptune. The saline solution used for the wash out will contain antibiotics), pulses in the lower leg and foot will be checked, vascular repair will be done if needed (unlikely), the soft tissue, muscle and any severed ligaments or tendons will be sewn up, a drain left in place and the wound closed. He'll be pumped full of antibiotics and he should recover fully. He will have some nasty scars, but with a good orthopedic surgeon he won't have even a slight limp. 100% back to normal. While this looks nasty, many automobile accidents leave the femur in much worse shape. Despite appearances, neither the fractures or the wound are all that bad.
Muscle damage could cause problems. A report says that dead muscle was excised. This should not have occured and would be the result of delayed treatment. In the US, this guy would have been in the OR within 30 to 45 minutes tops from his arrival in the Emergency Department. If available, he would have been initially transported to a Level 1 Trauma Center. He would likely have had an IV inserted, been typed and crossed, the preliminary X-rays would be done and possibly followed by a quick CT. Permits signed and off to the OR.