This is the original file for the Dual Pistols from Fortnite: Battle Royale! Yes it works because i have tested it! THE SIZE OF THE MODEL IS BIG SO MAKE SURE TO RESIZE IT USING THE FOLLOWING STEPS:
1.Right click on the model 2.Go down to "Utilities" 3.Click on "Add Scale Control To Models" 4.Now open the bones of the model of the gun model 5.Go down to "Body" 6.Click on "rootTransform_scale" 7.If you look a little to the right where the lighting controls would be you will see a tab that says "rootTransform_scale" 8.Drag the little line on that tab and resize the model to your correct preference!
NOTE #1: The model may still be big even though it is scaled to the down a bit so make sure to use these same steps to resize your character model too! Hope this helped!
NOTE #2: You WILL have to duplicate the model in SFM so that you can get the effect of the Dual Pistols like in the preview because the model was only exported with just one weapon and there was no way to actually get a "Dual" set of pistols into SFM.