Well it is a beta but let me just say some things.
The military doesn't let every soilder in the army use a weapon of their choice out of so many weapons.
The people in the game aren't as funded and won't have as much money as an army in a country. They don't have billions of dollars.
They won't be buying every gun on the market and throw them around a map just for people to pick up.
They can only carry the weapons on their backs to whatever location they are at, there isn't some military base 2 yards away.
I just wanted to point this stuff out, no offence Scream. Please don't hate me :c