TFX Sights are always ready-made from ultra-tough, chemical-resistant materials and providing a bright sight picture both day and night, helping you stay prepared for any scenario. TFX PRO takes it to the next level, offering a contrasting colored front focus ring and U-notch rear sight design for faster sight acquisition and improved accuracy. Additionally, the rear sight features an aggressively angled front edge for emergency one-handed operation. TFX PRO sights are designed for shooters who require the absolute best reliability, visibility, and accuracy. Notes Generally Sig Sauer P series 9mm/357 Sig firearms use #8 front/#8 rear and 40 S&W/ 45 ACP firearms use #6 front/#8 rear (such as the Sig P220 Combat, P226 Legion, P320 Nitron and others). FeaturesThe first and only of its kindFully protected TFO technology encapsulated in a virtually indestructible configurationImpervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processesUnmatched visibility in ...