Fits Sig Sauer models calibrated for .40S&W and .45ACP including P220 P229 P240 P245 Pro233 Pro2340 Pro245 and also the P938. – Trijicon Bright & Tough™ Suppressor Night Sights are three-dot tritium iron sights that allow shooters the ability to line up their sights in both bright and low-light situations. While standard height sights do not provide an aiming solution when using a suppressed firearm; the additional height of suppressor night sights will clear the added height of a suppressor allowing shooters the ability to line up their sights on target. Additionally suppressor night sights can be used as back up iron sights with the Trijicon RMR®.