The Smith & Wesson M& P platform is one of the most widely carried duty and defensive pistols in law enforcement and civilian use, and adding a proper tritium night sight is one of the most practical upgrades an M& P owner can make for defensive readiness. The Trijicon Bright and Tough 3-Dot Night Sights SA37 is the purpose-built night-sight solution for S& W M& P, SD9 VE, and SD40 VE pistols, please note that this set excludes M& P Shield and C. O.R. E. Series models. The SA37 3-Dot Night Sights self-luminous tritium system provides a clear, fast three-dot aiming reference in complete darkness and low-light conditions, without batteries, switches, or electronics. The tritium-phosphor lamps glow continuously through passive tritium decay - always on and always providing the sight picture that accurate defensive shooting in darkness demands. The Trijicon Bright and Tough series increases night-fire shooting accuracy by up to five times over conventional sights at the same instinctive shooting speed - a proven performance advantage that serious M& P owners trust for their defensive carry and duty pistols. The Trijicon Bright and Tough Night Sights SA37 is designed specifically for S& W M& P, SD9 VE, and SD40 VE sight configurations — a purpose-built fit that installs correctly on the compatible models and delivers proper three-dot alignment. Every Trijicon sight set is engineered to specific handgun dimensions for reliable installation and performance. The pistol sight SA37 shock-resistant design handles the recoil and hard use that M& P duty and defensive pistols accumulate through regular training and daily carry. Silicone rubber cushioning protects the tritium lamps from shock. Each lamp is capped with a sapphire jewel for even light distribution and solvent resistance. Aluminum cylinders provide additional structural protection. Trijicon Novak M& P 3 Dot Front & Rear Night Sight Set SA37 600442 in Front White Outline/green Tritium