When you enter the multiplayer mode in Mini Militia, the double guns can be unlocked without spending any money. This article explains how you can unlock the double guns for free by following the instructions given in the article.
Doubles are usually performed with the Magnum and the UZI, which are the two most commonly used guns for doubles.
The double guns icon is located just to the left of Magnum in your armoury, and it will appear on the right hand side as soon as you click on it. In terms of how many levels it is, it’s somewhere between levels 10 and 14. It unlocks with every level you reach, though.
In order to do so, you will first need to change the tab to SMGs from the one you are currently using. The icon for the double-gun should be down below the UZI. As you progress through the levels, you will also be able to use this double gun.
You can use different types of guns, and you will have to open crates in order to raise the level of the gun you are using. You will see an image in the following section that shows a crate that offers the option to upgrade UZI.
Using the upgrade option located in the Armoury, UZI’s level can now be boosted by going to the SMGs in the Armoury and clicking on upgrade.
The player who reaches the level of 10 will be able to unlock the double gun as soon as he reaches that mark.