Versa Pod 150-630 AR-15 M16A2 Free Float Tube Mount Bipod Rest Adapter - Sling Swivel Mount Integrated Hand Rest For Comfort and Maximum Stability When Taking your Shot ALL-STEEL Core Construction With PA66 Molding For Superior Strength Allows Limited Axial Rotation (Canting) tilt. Fits All Free Float AR-16 and M16 Rails With Sling Swivel Attachment This Adapter fits The Versa-Pod Classic and 50 Series bipod Rest - Also Fits Parker Hale