XS R3D 2.0 Tritium Night Sight for Glock 21 Green

Description

The XS R3D 2.0 Tritium Night Sight for Glock 21 Green is a premium night sight solution designed for shooters who demand superior visibility in low-light conditions. XS Sights has engineered this sight to provide exceptional performance whether you’re training at the range, engaged in home defense scenarios, or carrying professionally. The R3D 2.0 represents the latest evolution in tritium night sight technology, combining proven design principles with modern manufacturing precision. This sight is compatible with multiple Glock models, making it an excellent choice for shooters who own multiple pistols in the Glock family.

XS R3D 2.0 Tritium Night Sight for Glock 21 Green — Key Specifications

• Manufacturer: XS Sights
• Model: R3D 2.0
• Compatibility: Glock 20, 21, 29, 30, 30S, 37, and 41
• Front Sight: Green Tritium with Green Outline
• Rear Sight: Green Tritium
• Sight Radius: Optimized for Glock platform ergonomics
• Material: Steel construction for durability and reliability
• Installation: Dovetail mount (professional installation recommended)
• Low-Light Performance: Tritium-powered for complete darkness visibility
• Warranty: Backed by XS Sights manufacturer warranty

Performance & Reliability

The XS R3D 2.0 Tritium Night Sight for Glock 21 Green delivers exceptional performance in all lighting conditions, from bright daylight to complete darkness. The tritium vials are hermetically sealed and require no external power source, meaning they function reliably whether you’re at the range or in a critical situation. The green tritium paired with the green front outline creates a sight picture that is both fast to acquire and easy to track during rapid fire sequences. Testing by professional shooters confirms that the XS R3D 2.0 reduces sight acquisition time compared to standard factory Glock sights.

Reliability is paramount in any defensive firearm sight, and XS Sights has built the R3D 2.0 with that principle as the foundation. The steel construction withstands harsh recoil impulses, extreme temperatures, and the rigorous abuse that comes with serious shooting practice. The tritium elements maintain their luminosity for approximately 12 years, providing reliable low-light performance throughout the sight’s practical lifetime. Shooters report that the XS R3D 2.0 maintains zero shift and grouping consistency through thousands of rounds.

Many tactical professionals and competitive shooters choose the XS R3D 2.0 Tritium Night Sight for Glock 21 because it doesn’t require any sight alignment compromise. The green tritium coloring provides excellent contrast against typical backgrounds, and the luminous properties activate automatically in low-light environments without any user intervention. The sight’s robust construction means it will remain functional even after being dropped or subjected to harsh treatment in field conditions.

Intended Use & Applications

The XS R3D 2.0 Tritium Night Sight for Glock 21 is ideal for defensive shooters, law enforcement professionals, and military personnel who carry larger-frame Glock pistols. Glock 21 owners who prioritize low-light capability and faster target acquisition will find that this sight upgrade dramatically improves their shooting performance. Home defense shooters appreciate the night sight advantage during low-light scenarios where identifying threats quickly is critical. Professional security personnel and armed civilians who need reliable rapid-fire capability in varied lighting conditions make this sight a priority upgrade.

Range shooters and competitive pistol competitors benefit from the XS R3D 2.0’s fast sight picture and excellent tracking characteristics during timed fire events. Hunters who use Glock 21 models for handgun hunting or backup defense appreciate the enhanced visibility during dawn and dusk hunting hours. Night shift workers and those with careers in security or law enforcement find that having reliable tritium sights provides peace of mind and confidence in their equipment. The sight’s compatibility with multiple Glock models means that shooters with several pistols can standardize their sight systems across their collection.

Whether you’re upgrading a newly acquired Glock 21 or refreshing sights on an existing pistol, the XS R3D 2.0 Tritium Night Sight for Glock 21 Green is an investment in your shooting capability. The sight works equally well for concealed carry pistols, duty guns, or dedicated range trainers. Shooters in all disciplines—from IDPA to IPSC to personal defense practice—report significant improvements in their performance when switching to quality tritium night sights. The versatility of this sight makes it suitable for any shooter who takes their Glock 21 seriously.

Why Buy From CaliperDepot?

CaliperDepot.com is your trusted source for premium firearm sights and accessories, including the XS R3D 2.0 Tritium Night Sight for Glock 21. We maintain competitive pricing on all major brands while offering fast, reliable shipping to get your upgrades to you quickly. Our in-stock inventory means you won’t face long delays waiting for popular items, and we carefully curate our selection to include only products that meet professional standards. When you shop with CaliperDepot, you’re buying from a retailer who understands the firearms community and prioritizes customer satisfaction above all else.

Our customer service team is knowledgeable about firearm sights and accessories and can answer your questions about compatibility, installation, and performance. We stand behind every product we sell and maintain easy return policies if you’re not completely satisfied. Fast shipping means your XS R3D 2.0 can be on your way within hours of ordering. Choose CaliperDepot for reliability, competitive pricing, and the peace of mind that comes with buying from an established, trusted retailer.

Upgrade your Glock 21 today with the XS R3D 2.0 Tritium Night Sight for Glock 21 Green and experience the difference quality night sights make in your shooting performance. Whether you’re focused on defensive readiness, competitive shooting, or simply want the best sights available for your pistol, this sight delivers exceptional value and performance. The combination of proven XS Sights engineering, tritium reliability, and green sight coloring makes this an outstanding choice for any Glock 21 owner. Order your XS R3D 2.0 from CaliperDepot now and join thousands of satisfied shooters who have upgraded their sights for enhanced low-light capability. For more information about XS Sights’ complete product line, visit XS Sights’ official website.