A lot of people have created a similar post, and I do not want to steal credit. Please take a look at their suggestions before looking at mine.
In real life, soldiers are given varying amounts of weapons, whether it is just 1, 2, or 3, or a lot more than that. There is a special forces unit in the Russian army, and in the Israeli army that carry up to 5 weapons including:
It looks ridiculous, bit it can be done. The knife can be mounted on the shoulder, the two pistols on the hip and shin, the grenade launcher to the back on the left side, the Rifle to the back on the right side, and the Assault Rifle to a chest strap in front. It all depends on the clothing, gear, etc you are wearing. It also depends on your weight, skills, etc.
It would be cool to have a similar feature in unturned, where what you can carry is based on what gear you are wearing, how much you weigh, your skillset, etc.