In the gun machine you can put all your parts inside the machine and you'll have all the parts ready when you need it. In the gun machine menu at the upper side there are two options. The second one is what you need to upload the parts and the machine automatically will show you which are the weapons for which you already have the parts.
In the gun machine you can put all your parts inside the machine and you'll have all the parts ready when you need it. In the gun machine menu at the upper side there are two options. The second one is what you need to upload the parts and the machine automatically will show you which are the weapons for which you already have the parts.