Locking Picatinny Sling Mounts

thingiverse

These are mounts for sling attachments that fit onto Picatinny rails, with an extra rail included if you prefer that setup. To use them, print out the mount and head to a hardware store, where you'll need to find an eye bolt that fits into one of the four holes on the rounded end, along with a long screw that can be threaded into the rail locking hole. As for screw size, I'm not sure what will work best, but it's likely there are many options available.