Glock 21 Sight Options
Upgrade your Glock 21 handgun with our premium tritium sights. We tailor sight pictures to your specific needs, from brightness, sight acquisition speed, or vision issues. R3D sights are traditional 3-Dot tritium, notch and post sights, DXT2s are our flagship express sights built for fast sight acquisition, and our F8 sights blend R3D and DXT2 sight pictures.
About the Glock 21
Following quickly after the G20 in 10MM, the Glock 21 handgun is a slightly lighter version chambered for .45ACP. Boasting 13 rounds in a flush fitting magazine, the G21 offers .45 ACP fans a handgun that is similar in size to a 1911 but with less weight and slightly more than 50% more ammunition in the first magazine. They have proven to be tough, accurate and reliable handguns.
Glock Generation Compatibility
All XS Glock sights are compatible with every generation, including the Modular Optic System (MOS). Don’t get sucked into the Gen 5 compatible sight or MOS sight overhang forums. Our sights have been tested on numerous generations for the past 25-years. Our minimalistic glock 21 sight designs have always avoided big overhangs, saving us from launching a MOS-specific set due to the dovetail movement.
Glock Sight Installation
Are you looking at installing the sights yourself? Don’t worry; they are one of the easiest sets to install. Most of our rear sights can be installed by a sight pusher tool or the old hammer and punch method. Most of our Glock sights ship with a Glock front sight tool and red Vibra-Tite thread locker.
Each product page has detailed instructions per installation method, and you can also check out our Glock DIY install blog for some crafty ways to install sights if you don’t want to invest in a sight pusher tool or own a vise. We have expert gunsmiths on staff that can walk you through the process.