XS Sights R3D 2.0 Night Sight Set for GLOCK 21 – Suppressor Height, Green Tritium Front

The XS Sights R3D 2.0 night sight set delivers 24/7 visibility for GLOCK 21 pistols with a tritium-powered front sight and blacked-out rear. Designed for suppressor-height clearance, this set allows co-witnessing with optics or clears suppressor sights over taller slide profiles. The green tritium front lamp provides a glowing aiming point in low light without batteries, while the wide notch rear promotes rapid target acquisition under stress.

Suppressor-height sights sit taller than standard profiles to clear the cylinder of a mounted suppressor or to co-witness with red dot optics. Precision-machined from steel with a rust-resistant finish, these sights install via standard dovetail cuts on GLOCK 21 slides. The tritium front insert is user-replaceable and rated for 10-12 years of constant illumination. Ideal for duty, home defense, or competition shooters running suppressed or optic-equipped GLOCK 21 pistols.

• Type: Tritium Night Sight Set (Front & Rear)
• Compatibility: GLOCK 21
• Height: Suppressor Height
• Front Sight: Green Tritium Lamp
• Rear Sight: Blacked-Out, Wide Notch
• Tritium Lifespan: 10-12 Years
• Material: Steel, Rust-Resistant Finish
• Installation: Standard Dovetail