Glock 21 Gen5 MOS .45 ACP Pistol with Modular Optics, Black
The Glock 21 Gen5 MOS .45 ACP Pistol with Modular Optics, Black is a .45 ACP full size handguns from Glock. It is available from 1 vendor at $849.99.
Product Information
Name: Glock 21 Gen5 MOS .45 ACP Pistol with Modular Optics, Black
Brand: Glock
Category: Full Size Handguns
Caliber: .45 ACP
Barrel Length: 4.61"
Capacity: 10 rounds
UPC: 764503061639
SKU: UCDSUKw2Z
Description
The Glock 21 Gen5 MOS is a striker-fired semi-automatic pistol chambered in .45 ACP with a 4.61-inch barrel, 8.07-inch overall length, and 10+1 capacity. The Gen5 changes over earlier generations include a flared mag-well, front slide serrations, and interchangeable backstraps. The MOS cut allows direct mounting of compatible red dot sights. Weight is 2.4 lbs (29.81 oz), unloaded.
Key Specifications
- Manufacturer: Glock
- Model Name: G21 Gen5 MOS
- Caliber: .45 ACP
- Action Type: Safe Action (Semi-Automatic)
- Barrel Length: 4.61 inches
- Overall Length: 8.07 inches
- Capacity: 10+1 rounds (includes three magazines)
- Weight: 2.4 lbs (29.81 oz.)
- Grip Type: Black Interchangeable Backstrap
- Safety Features: Firing Pin / Trigger Block (No Manual Safety)
- Finish Color: Black
Detailed Features
- Modular Optics System (MOS): The slide is pre-cut to accept compatible red dot sights using included adapter plates, without needing aftermarket machining.
- Interchangeable Backstraps: Three sizes included, allowing grip circumference adjustment for different hand sizes.
- Fixed Glock Sights and Standard Trigger: Fixed sights for consistent reference, standard trigger for smooth pull.
- Flared Mag-Well and Front Slide Serrations: The flared well speeds magazine changes; front serrations give more grip purchase on the slide.
Complete Specifications
| Caliber | .45 ACP |
| Model | G21 G5 MOS |
| Capacity | 10 rounds |
| Magazines included | 3 |
| Barrel length | 4.61" |
| Overall length | 8.07" |
| Weight | 29.1 oz |
| Action | Semi Auto |
| Finish | Blued |
| Frame material | Polymer |
| Color | Black |
| Stock material | Polymer |
| Sights | Fixed |
| Safety | Firing Pin / Trigger Block |
Frequently Asked Questions
What caliber is the Glock G21 G5 MOS?
The G21 G5 MOS is chambered in .45 ACP.
Who makes the G21 G5 MOS?
Glock makes the G21 G5 MOS.
What type of firearm is the Glock G21 G5 MOS?
It is a striker-fired semi-automatic full-size handgun.
What is the barrel length of the G21 G5 MOS?
The G21 G5 MOS has a 4.61-inch barrel.
How many rounds does the Glock G21 G5 MOS hold?
It has a 10+1 capacity and ships with three magazines.
Is the Glock G21 G5 MOS optics-ready?
Yes, the MOS slide is pre-cut to accept compatible red dot sights using included adapter plates.
Where can I buy the Glock G21 G5 MOS?
Compare current vendor offers on this page.
What Reviewers Say
Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.
A lot of people feel like that this silhouette just hasn't changed and really it hasn't that much but the big difference is in the internals.
Big thing is the finger grooves you know the removal of the finger grooves to me really makes a huge difference with this pistol because the grip is already large.
Glock is known for having a little bit of a mushy trigger.
Your brake it's not all that great it's not very crisp but it's much better than the earlier gen models.
This is a man's gun if you got the moxie.
Customers Say
AI-generated insights derived from customer reviews and discussions on popular gun-enthusiast forums.
Discussion around the Glock 21 Gen5 MOS centers on the same themes that come up across Glock's larger-frame pistols. The .45 ACP chambering draws shooters who prioritize the caliber's ballistic characteristics, and reliability is the consistent thread. The G21 Gen5 runs the same basic way Glocks have always run.
The MOS system gets positive marks from anyone who wants to mount a red dot, which is increasingly common. The Gen5 ergonomic updates over the Gen4 are generally appreciated, particularly the improved grip texture and the absence of the finger grooves that divided opinions in earlier generations.
Size and weight are the main practical trade-offs. The G21 is a full-size pistol, and at 2.4 lbs unloaded it's not a concealed carry choice for most. Shooters who use it for home defense or range work find the weight helps absorb the .45 ACP recoil. Smaller-handed users occasionally comment on the grip diameter feeling substantial.
The .45 ACP vs. 9mm caliber debate shows up in nearly every thread. G21 supporters cite stopping power; 9mm advocates point to higher capacity in smaller packages. Both sides are well-represented. Aftermarket support for the G21 platform is deep. Holsters, sights, and accessories are widely available.
Where to Buy - 1 Offers Available
Price Range: $849.99 - $849.99
| Vendor | Price | Condition | Link |
|---|---|---|---|
| Guns Com | $849.99 | New | Buy Now |
