# Winchester SX4 Gen4 20GA Semi-Auto Shotgun - Cantilever Buck Edition

**Brand:** Winchester
**Category:** Semi-Automatic Shotguns
**Caliber:** 20 Gauge

## Specifications

- **Caliber:** 20 Gauge
- **Barrel Length:** 22"
- **Capacity:** 3 rounds
- **Finish:** Rifled
- **Weight:** 1 oz
- **Overall Length:** 43"
- **UPC:** 048702010125
- **SKU:** UCr9wfcL

## Description

The Winchester SX4 Cantilever Buck is a semi-automatic shotgun in 20 GA with a 22-inch barrel. The cantilever rib is integrated into the barrel and extends over the receiver, giving a stable base for a scope or red dot without needing a separate receiver mount. The receiver is aluminum alloy, the stock is synthetic, and the Invector Plus choke system is included.

### Key Specifications
- **UPC:** 048702010125
- **Gauge:** 20 GA
- **Action:** Semi-Automatic
- **Capacity:** 3 Rounds
- **Barrel Length:** 22 inches
- **Overall Length:** 43 inches
- **Weight:** 8.5 lbs (136 ounces)
- **Finish:** Black Synthetic Stock

### Features

The Inflex Technology recoil pad deflects the stock slightly downward as it compresses, which reduces muzzle rise during cycling and keeps the cheek weld more consistent for follow-up shots. The fiber optic front sight and adjustable rear sight work for iron-sight shooting; the cantilever rib handles optic use. The SX4 gas system adjusts to different load pressures, which generally means reliable cycling across a range of 20 GA loads.

## Frequently Asked Questions

**Q: What gauge is the Winchester SX4 Cantilever Buck?**

A: The Winchester SX4 Cantilever Buck is chambered in 20 GA.

**Q: What is the barrel length of the Winchester SX4 Cantilever Buck?**

A: It has a 22-inch barrel. The cantilever rib is integrated into the barrel and extends over the receiver for optic mounting.

**Q: How many rounds does the Winchester SX4 Cantilever Buck hold?**

A: It has a 3-round capacity.

**Q: Who makes the SX4 Cantilever Buck?**

A: Winchester makes the SX4 Cantilever Buck.

**Q: What type of firearm is the Winchester SX4 Cantilever Buck?**

A: It is a semi-automatic shotgun with an aluminum alloy receiver and a black synthetic stock.

**Q: Is the Winchester SX4 Cantilever Buck optic-ready?**

A: Yes. The cantilever rib gives a stable base for a scope or red dot directly on the barrel without needing a separate receiver mount.

**Q: Where can I buy the Winchester SX4 Cantilever Buck?**

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.*

> Reliability this is a gas operated system but it is extremely reliable.
>
> — [Whispering Wild](https://www.youtube.com/watch?v=uDNTkRySoUs&t=58s)

> Quality it's solid there's no loose Parts wobbling around rattling that make noise.
>
> — [Whispering Wild](https://www.youtube.com/watch?v=uDNTkRySoUs&t=88s)

> There's no you know little components or something that you really have to worry about losing.
>
> — [Whispering Wild](https://www.youtube.com/watch?v=uDNTkRySoUs&t=253s)

> We have seen the bolt hammer will come loose uh the fitment gets loose and they can pull out easier.
>
> — [Whispering Wild](https://www.youtube.com/watch?v=uDNTkRySoUs&t=311s)

> It's hard to say too many negatives about this gun and it's hard to provide any reason why we wouldn't buy it again.
>
> — [Whispering Wild](https://www.youtube.com/watch?v=uDNTkRySoUs&t=461s)

## What Customers Say

*AI-generated insights from customer reviews*

The Winchester SX4 Cantilever Buck in 20 GA has a largely positive user base, with a few recurring sticking points.

Reliability is the most-cited strength. Owners report that the shotgun cycles consistently across different loads, including lighter target shells and heavier hunting loads, without adjustments. The 20 GA chambering keeps recoil manageable, which comes up often from newer shooters and those who run the gun for long sessions.

The cantilever design draws specific praise from deer hunters. It lets you mount a scope or red dot directly to the barrel, maintaining zero when you swap barrels, which is useful if you run different configurations for different seasons.

On the negative side: price is the most common complaint, with some buyers feeling the SX4 costs more than comparable semi-autos. A few owners mention a break-in period during the first 50-100 rounds before cycling becomes fully reliable. Weight distribution gets occasional mention. At 8.5 lbs the gun is on the heavier side for a 20 GA, and some find it slightly muzzle-heavy during extended carry. Aftermarket accessories specific to this model are also limited compared to Mossberg or Remington platforms.

## Pricing

**7 offers available**

| Vendor | Price |
|--------|-------|
| Grabagun Com | $949.99 |
| Shootingsurplus Com | $967.40 |
| Buds Gun Shop | $991.49 |
| Kygunco Com | $994.39 |
| Centerfiresystems Com | $994.99 |
| Impactguns Com | $1112.49 |
| Guns Com | $1227.99 |

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