# Glock G21 Gen 4 .45 ACP Powerhouse: Reliable Defense & Sport Pistol

**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:** 764503102011
- **SKU:** UCDSUL6Xj

## Description

The Glock G21 Gen 4 is a full-sized semi-automatic pistol chambered in .45 ACP. It holds 10 rounds standard and weighs 29.3 oz unloaded, heavier than most polymer-framed pistols but manageable for most shooters at the range or in a duty holster.

### Key Specifications

- **Manufacturer:** Glock
- **Model:** G21
- **Series:** Gen 4
- **Caliber:** .45 ACP
- **Barrel Length:** 4.6 inches
- **Capacity:** 10 rounds (Standard)
- **Weight:** 1.83 lbs (29.3 oz)
- **Frame Material:** Polymer
- **Slide Material:** Forged Steel
- **Total Height:** 5.47 inches
- **Total Length:** 8.03 inches
- **Safety Features:** Trigger/Firing Pin/Drop safety

### Detailed Features

The Gen 4 frame uses Glock's RTF-style texture, which improves grip retention in wet or sweaty conditions. The action is double-action only, giving a consistent trigger pull on every shot with no manual cocking required. Fixed front and rear sights are standard; they're serviceable for target acquisition and can be swapped for aftermarket options if needed.

The three integrated safeties (trigger, firing pin, and drop) are passive, meaning the pistol requires a deliberate trigger press to fire. The forged steel slide has a black finish that holds up well to normal carry wear.

### Target Audience

The G21 Gen 4 fits law enforcement, security, and civilian shooters who want a full-size .45 ACP. The grip accommodates larger hands well. It works for home defense, duty carry, and range use, though its size makes concealed carry less practical than compact alternatives.

### Usage Scenarios

- Home defense, where .45 ACP terminal performance is the priority.
- Duty and range use, where the full-size frame and 4.6-inch barrel pay off in control and accuracy.
- Competition shooting, particularly in divisions where .45 ACP is required or preferred.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the G21 Gen 4 generally rate its reliability highly. It's one of the more consistent things said about the platform across forums and reviews. The pistol handles different .45 ACP loads without issue, and maintenance is straightforward for anyone familiar with Glock's standard field-strip process.

Accuracy gets positive marks too. The longer barrel and heavier .45 ACP round tend to steady the gun during follow-up shots for shooters who are comfortable with the grip size. The stopping power of .45 ACP is a common reason people choose this model for home defense.

Size is the main point of friction. The G21 is a large pistol, and some users note it's not comfortable for all-day concealed carry, particularly for shooters with smaller frames. Grip texture divides opinion: Gen 4 improved on earlier generations, but some still find it too aggressive or not aggressive enough depending on their hand size and carry setup.

Overall, the community sees the G21 Gen 4 as a dependable duty-size .45 ACP that does what it's designed to do. The size trade-off is real and worth considering before purchase, especially if concealed carry is the primary use case.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $599.99 |

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