LEUPOLD 2 Piece Bases Standard American Rimfire Finish:Matte Designed to fit on most

Designed to fit on most 7/8-inch-14 threaded progressive presses

Although MatchKing and Tipped MatchKing bullets are commonly used for varmint hunting

including rifles

Used by national level competitors for acute precision in competition

LEUPOLD 2 Piece Bases Standard American Rimfire Finish:Matte Designed to fit on mostLeupold steel Standard (STD) rings and bases are the most versatile of any mounting system we offer. This specific model fits a Ruger American RF and is the perfect choice for standard calibers less than . 300 Win. Mag. STD rings come in five different heights and are precision engineered to match up with STD 1 piece or 2 piece bases. The front dovetail ring pivots, allowing for lateral adjustment using the rear windage screws while bore sighting.