# Glock G21SF Gen 3 .45 ACP - Ergonomic & Reliable Semi-Auto Handgun

**Brand:** Glock
**Category:** Full Size Handguns
**Caliber:** .45 ACP

## Specifications

- **Caliber:** .45 ACP
- **Barrel Length:** 4.6"
- **Capacity:** 10 rounds
- **Finish:** Black
- **Weight:** 29.3 oz
- **Overall Length:** 8.03"
- **UPC:** 764503072017
- **SKU:** UCDSUKyjx

## Description

The Glock G21SF Gen3 is a .45 ACP full-size semi-automatic pistol with a 4.61-inch cold hammer-forged barrel and a 10+1 capacity. It weighs 29.1 oz (approximately 2.4 lbs) with a black nDLC finish, polymer frame, and fixed sights.

### Key Specifications
- **Brand**: Glock
- **Model**: G21SF Gen3
- **Caliber**: .45 ACP
- **Capacity**: 10+1 rounds
- **Barrel Length**: 4.61 inches
- **Weight**: 29.1 oz (approximately 2.4 lbs)
- **Finish**: Black nDLC Finish
- **Action Type**: Semi-Auto Striker Fire
- **Sights**: Fixed

### Detailed Features

The SF (Short Frame) designation means the grip has a reduced circumference compared to the standard G21, which makes the gun more accessible to shooters who found the full-size G21 grip too large. The Safe Action system uses three independently operating safeties (trigger safety, firing pin safety, and drop safety), all of which disengage on trigger pull. The cold hammer-forged barrel delivers consistent performance across high round counts. Fixed sights are standard; no adjustable rear is included at the factory level.

### Usage Scenarios

As a full-size .45 ACP pistol, the G21SF works well for home defense where carry weight isn't a daily concern. Law enforcement and duty use were part of the original design intent. On the range, the fixed sights and predictable Safe Action trigger make it straightforward to train with.

## Frequently Asked Questions

**Q: What caliber is the Glock G21?**

A: The G21 is chambered in .45 ACP.

**Q: Who makes the G21?**

A: The G21 is made by Glock.

**Q: What type of firearm is the Glock G21SF?**

A: It is a full-size semi-automatic pistol with a striker-fired Safe Action system and a polymer frame.

**Q: How many rounds does the Glock G21SF hold?**

A: It has a 10+1 capacity.

**Q: What is the barrel length of the Glock G21SF?**

A: The G21SF has a 4.61-inch cold hammer-forged barrel.

**Q: What does the SF designation mean on the Glock G21SF?**

A: SF stands for Short Frame. The grip has a reduced circumference compared to the standard G21, making it more accessible to shooters who found the full-size G21 grip too large.

**Q: Where can I buy the Glock G21?**

A: Compare current vendor offers on this page.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> This is definitely the big boy on the block the model 21 and 45 Auto it's it's definitely a beast.
>
> — [SH007ER: The Series](https://www.youtube.com/watch?v=1SGOTCmtUfg&t=69s)

> After you shoot the model 20 which is in 10 millimeter this is a cakewalk the recoil is very manageable.
>
> — [sootch00](https://www.youtube.com/watch?v=yMBtdO1o8T8&t=708s)

> Stock magazine release is very squared off which makes it very very positive.
>
> — [SH007ER: The Series](https://www.youtube.com/watch?v=1SGOTCmtUfg&t=133s)

> It's a great pistol and just like every Glock it's got the safety write built into the trigger.
>
> — [SH007ER: The Series](https://www.youtube.com/watch?v=1SGOTCmtUfg&t=215s)

> That was a whole lot of fun I can't say anything bad about it I like a 45 to begin with and this one really delivers.
>
> — [SH007ER: The Series](https://www.youtube.com/watch?v=1SGOTCmtUfg&t=316s)

## What Customers Say

*AI-generated insights from customer reviews*

The G21SF Gen3 gets reviewed with the same strengths and caveats as the rest of the Glock .45 ACP lineup. Reliability is universally praised. The platform runs through diverse ammunition without complaint, which is the baseline expectation Glock buyers bring to the purchase. Accuracy gets consistent positive marks from owners who practice regularly.

The SF grip is frequently called out as the reason many buyers chose this over the standard G21. People with smaller or medium hands report a noticeably better fit and improved control. The .45 ACP caliber is appreciated for stopping power in self-defense contexts, though some newer shooters find the recoil heavier than smaller calibers.

Size and weight are the main practical limitations. At 29.1 oz, it's on the heavier end for a carry gun, and the full-size frame rules it out for comfortable daily concealed carry for most people. Aftermarket support is deep, though less focused on this frame size than on the G17/G19 footprint.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Gunbuyer Com | $546.00 |

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*Data from [GunsNation](https://gunsnation.com)*