This is an adapter for the long barrel from the Nerf FortNite 6SH pistol. This allows you to quickly disassemble the barrel, insert a new front mount and then attach the barrel to any Nerf barrel lug blaster. Additionally, if you want to connect it to your 6SH pistol, you can print the adapter from Thingiverse here: https://www.thingiverse.com/thing:4933333. This adapter fits perfectly so you can attach other barrel lug based attachments to your 6SH pistol.

IMPORTANT NOTE: The fit inside the barrel may be tight. If one of the screw loops on the side (there are 4) breaks, no need to reprint, as only two are really necessary to hold it in place.

For pistols that are already attached, you will need to unscrew the 7 screws and work the original adapter off of the pistol tip. You may need to use a screwdriver to release the clips, but should just need to squeeze the two clips on the side of the original adapter to remove it.