USD 9.99 (Indicative price - actual current price possibly lower)
US gunsmith supply: Fits: bisley large frame; new model blackhawk; old army, .45 mfg: ruger. Find here reliable & durable gunsmith supplies including handgun front sight bases by Ruger. US supply MPN: KMR13601. Ruger sight base front ss. Distributor SKU: 780012015-780012015-11649.
