This adapter is best suited to single shot pistols. It will fit rifles, but accuracy may be affected because the adapter mounts on to the barrel and not the stock. It fits barrels with diameters from .550 inch to .812 inch.
Specifications:

Type	Bipod Adapter
Tube Diameter
Height
Size
Finish	Black
Style
Material	Steel
Style Description
One or Two Piece
Adaptor Type	Bipod Adapter
Mount Type
Lock Type