Okay, we're dealing with a mounted patrol here, for simplicity's sake. I see a few issues here. First, the 21 foot rule for how close you let someone get to you on foot becomes a 100 meter rule when mounted. The MP5s won't have enough energy after traveling 100 meters to punch holes through laminated windshields or sheet metal. Get rid of those first.
Second, your AKSU-74 is shooting a 52 grain bullet that has an air pocket in the nose (if you're using surplus ammo) through an eight inch barrel. Lower velocity, lower penetration. Lose it.
Third, the limitations of the M4 with its shorter barrel and military ammo are legendary here on TFL, and I personally tried to trade in my M249 SAWs for M240Bs during my last Iraq tour due to the 5.56mm's limited effectiveness from a short barrel in a mounted role. Ditch the M4A1.
Now we have 4 AK-47s left. I'm assuming because you are using them in vehicles you got the folding stock, so good there. However, not enough energy for my taste to punch into an engine that well. So, if you have the cash, I'd trade in everything for eight FAL carbines with folding stocks. If not, I'd keep the AK-47s and get four FAL carbines to replace the other weapons. The 7.62x51mm will hit harder and pierce better than the 7.62x39mm. And always use armor-piercing ammunition in weapons used primarily around vehicles. It helps to cut through windshields and vehicle bodies.
And just because we're not Marines doesn't mean us Army guys don't know anything about weapons selection and patrolling.
