Start with all these parts and two pieces of webbing at least 4 feet long each. I prefer 6 foot for the adjustable end, but I am a big guy.
Run the webbing through the adjustment buckles first then through the HK buckle and then back through
Double up on the adjustment buckles for security
This is what the back end should look like, the part that attaches to the rear of the rifle
The adjustable side of the webbing should run under the ALICE buckle then up the back and through it
The Finished Sling, Enjoy!