Good example of using paracord to attach a general purpose strap as a sling, but can be used to attach just about any kind of sling.
A fair amount of people either don’t understand a Prusik hitch in general or can’t get their mind wrapped around using it on front sights, forearms, or stocks.
Also a good example of a Colt CS butt which uses the M16A2 nylon material, buttplate, and lower screw, but has the @ 5/8" shorter M16/A1 length.