Ruger Standard, Ring, 1" High(5), Grey Stainless Finish, 5KTG, Sold Individually 90295
Specifications:

Type	Ring Single
Tube Diameter	1"
Height	High
Size	Accepts up to 52mm
Finish	Target Gray
Style
Material	Stainless Steel
Style Description
One or Two Piece
Adaptor Type
Mount Type
Lock Type