Tombstone Barricade Stop.
This Barricade stop has the following features:
Screws onto the bottom of the Evolution Bipod allowing you to use the front part of the bipod as a barricade stop. The bottom of the barricade stop has a ARCA Swiss rail machined into it allowing the bipod to be mounted into an ARCA Swiss type Tripod. There is also a flushcup mount machined in for sling attachment. There is a 1/4-20 screw provision to accept tripod plates.