# GLOCK 21 Gen3 SF .45 ACP 4.61in Threaded Barrel

**Brand:** Glock
**Category:** Semi-Automatic Handguns
**Caliber:** .45 ACP

## Specifications

- **Caliber:** .45 ACP
- **Barrel Length:** 4.61"
- **UPC:** 764503911293
- **SKU:** UCDSUOV4f

## Description

The GLOCK 21 Gen3 SF (Short Frame) is a .45 ACP semi-automatic pistol with a 4.61-inch threaded barrel and a capacity of 13+1 rounds. The Short Frame grip reduces the front-to-back grip dimension compared to the standard G21, and the Gen3 rail accepts lights and accessories. The threaded barrel is ready for muzzle devices.

### Key Specifications
- **Brand**: GLOCK
- **Model**: 21 Gen3 SF
- **Caliber**: .45 ACP
- **Action**: Semi Auto
- **Capacity**: 13+1 rounds
- **Barrel Length**: 4.61 in

### Detailed Features
- Short Frame (SF) grip for a reduced front-to-back measurement
- 4.61-inch threaded barrel
- 13+1 round capacity in .45 ACP
- Gen3 frame with accessory rail
- Full-size platform

## Frequently Asked Questions

**Q: What caliber is the 21 Gen3 SF?**

A: The GLOCK 21 Gen3 SF is chambered in .45 ACP.

**Q: Who makes the 21 Gen3 SF?**

A: It is made by GLOCK.

**Q: What type of firearm is the 21 Gen3 SF?**

A: It is a full-size semi-automatic pistol with a Short Frame grip that reduces the front-to-back grip dimension.

**Q: Is the 21 Gen3 SF threaded?**

A: Yes, it has a 4.61-inch threaded barrel ready for muzzle devices.

**Q: What is the barrel length of the 21 Gen3 SF?**

A: The barrel is 4.61 inches long.

**Q: How many rounds does the 21 Gen3 SF hold?**

A: It holds 13+1 rounds of .45 ACP.

**Q: Where can I buy the 21 Gen3 SF?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners who gravitate to the G21 SF over the standard G21 usually do so because the Short Frame grip fits smaller hands without sacrificing magazine capacity. The 13-round .45 ACP capacity is a genuine selling point, and most owners report zero reliability issues across a wide range of ammunition.

The threaded barrel version gets attention from suppressor owners, since the G21 is already subsonic-friendly in .45 ACP and runs quietly with a can. The trigger is the same as any Gen3 Glock, which means it is functional and consistent but not exciting, and aftermarket options are plentiful if that matters.

The G21 SF sits in an interesting spot where it is large enough to be a full-size service pistol but the SF grip makes it more accessible. Some shooters find it still too wide for comfortable concealed carry, while others carry it daily without issue. The platform is proven and parts are everywhere.

## Pricing

**1 offers available**

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

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