The Picatinny Rail system originated in the military to fit rifle scopes securely, but has since evolved to cover more uses, and is now used to attach selected rifle supports such as the  as a quick release system.  

The Vanguard Picatinny Rail Quick shoe is designed to fit onto the the rifle sling buckle on the fore stock.  Being discreet and lightweight it can be left on in day to day use.

When additional support is needed, then simply attach the base into the clamp of a suitable gun rest, such as a bipod, and tighten.  This saves time and effort when compared to attaching/removing a fixed gun rest. 

Not suitable for use with:

• Aluminium  gun rest
• Carbon fibre  gun rest
• Endeavor LDA Picatinny to Arca compatible adaptor