Brownells 3Xl-Tall Sight Set Trit-Wht Ol.365''F/Serrate .451''R Glock

The Brownells 3XL-Tall Sight Set brings reliable low-light performance to your Glock pistol. This tritium night sight pairing is engineered for shooters running compact red dot optics on Gen 3, Gen 4, or Gen 5 Glock platforms. The generous sight heights—.365" front and .451" rear—are purpose-built to co-witness properly with popular sealed-emitter optics like the Holosun 407C/507C/508T, Trijicon RMR series, SRO, and EOTech EFLX. Whether you're zeroing at the range, hunting in low light, or setting up a duty gun, these irons serve as a reliable backup and a fast sight picture when your primary optic is down.

Both the front and rear sights feature serrated edges that reduce glint and aid positive control during draw and manipulations. The front sight carries a premium tritium insert paired with a white outline, giving you fast target acquisition in darkness while maintaining visibility in daylight. The rear sight uses a U-notch cut—a proven geometry that lets you quickly center the front sight post for intuitive, repeatable aiming.

Brownells designed these sights for their own slide cuts, but they'll drop into any standard Glock pistol with conventional Glock sight dovetails. If you're building a rifle-optic-ready carry gun or hunting rig and need irons that won't fail you, the 3XL height is the go-to choice for taller red dots on full-size Glocks.

Key Features

• Premium tritium insert with white outline front sight for low-light target acquisition
• Serrated front and rear sights reduce glint and aid tactical control
• U-notch rear sight geometry for fast, intuitive front-sight centering
• 3XL height (.365" front / .451" rear) designed for co-witness with compact sealed-emitter red dots
• Compatible with Glock Gen 3, Gen 4, and Gen 5 pistols with standard sight dovetails
• Optimized for optics like Holosun 407C/507C/508T, Trijicon RMR/RMR HD/RCR/SRO, and EOTech EFLX

Specifications

Frequently Asked Questions

Will these sights fit my Glock?

The 3XL-Tall set is designed for Glock Gen 3, Gen 4, and Gen 5 pistols with standard Glock sight dovetails. Brownells engineered them for their own slides, but they work with any Glock platform using conventional sight cuts. If you're unsure whether your Glock has standard cuts, check your manual or contact us.

What red dot optics work best with the 3XL height?

The .365" front and .451" rear height is optimized for compact sealed-emitter sights including the Holosun 407C, 507C, and 508T, Trijicon RMR/RMR HD/RCR/SRO, and EOTech EFLX. These sights will co-witness properly with those optics on Gen 3/4/5 Glocks.

Can I use these as backup iron sights?

Yes. The tritium inserts provide reliable low-light aiming when your primary red dot is unavailable, and the U-notch rear geometry combined with the front post allows fast, repeatable aiming at close to medium range.

Do the tritium inserts require batteries?

No. Tritium sights are self-illuminating and require no batteries or activation. They glow consistently in low light through radioactive decay and work indefinitely without maintenance.