Trijicon Sig Sauer .40 S&W.45 Acp Bright & Tough Night Sight Set (Yellow Rear) Black Sig sauer .40 S&W, .45 ACP w/yellow rear night sight set/fits: Sig sauer models calibrated for .40S&w & .45ACP including P220, P229, P240, P245, P938, Pro233, Pro2340, & Pro245 6 front and #8 rear Machined steel construction Extra large front dot/tritium-illumination technology Self-illuminating/no batteries require