The third component of the Phalanx Barricade System. The Universal Adapter attaches to any MIL-STD 1913 rail to make it possible for you to instantly mount or reposition your Arca-Swiss accessories, bipods, tripods or other Picatinny accessories with the push of a button. It locks into place automatically when the button is released. Can also be used with plates or to hard mount a bag. Accepts accessories using 1/4-20, 3/8-16 or 10-24 screws and includes a 3/8-16 to 10-32 adapter for Harris-style bipod mounts. See the complete PBS description on our Products page and see it in use on our Gallery page. Machined from 6061-T6 aluminum and stainless steel in the USA.