# Mossberg 590A1 Tactical Defender 12GA Pump Shotgun - 18.5" Barrel

**Brand:** Mossberg
**Category:** Pump-Action Shotguns
**Caliber:** 12 Gauge

## Specifications

- **Caliber:** 12 Gauge
- **Barrel Length:** 18.5"
- **Capacity:** 6 rounds
- **Finish:** Silver Marinecote
- **Weight:** 112 oz
- **Overall Length:** 39.5"
- **UPC:** 015813507677
- **SKU:** UCHGBrjR

## Description

The Mossberg 590A1 is a 12 GA pump-action shotgun built around a heavy-walled barrel and a Marinecote finish that resists corrosion in hard conditions. It holds 6 rounds plus 1 in the chamber, runs an 18.5" barrel, and has a 3" chamber. Weight is 7 lbs with a black synthetic fixed stock. The bead front sight keeps things simple for fast target acquisition. The Marinecote receiver and heavy-walled barrel are the spec differences that set the 590A1 apart from standard 590 models.

### Key Specifications
- **Brand:** Mossberg
- **Model:** 590A1
- **UPC:** 015813507677
- **Gauge:** 12 GA
- **Action:** Pump Action
- **Capacity:** 6 Rounds + 1 Chambered
- **Barrel Length:** 18.5 inches
- **Chamber Size:** 3 inches
- **Weight:** 7 lbs.
- **Finish:** Black synthetic stock with Marinecote receiver

## Frequently Asked Questions

**Q: What caliber is the Mossberg 590A1?**

A: The 590A1 is chambered in 12 Gauge with a 3" chamber.

**Q: What is the barrel length of the Mossberg 590A1?**

A: It has an 18.5" barrel.

**Q: How many rounds does the Mossberg 590A1 hold?**

A: It holds 6+1 rounds, six in the magazine tube and one in the chamber.

**Q: Who makes the 590A1?**

A: Mossberg makes the 590A1.

**Q: What type of firearm is the Mossberg 590A1?**

A: It is a pump-action shotgun with a black synthetic fixed stock and a Marinecote receiver.

**Q: Where can I buy the Mossberg 590A1?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

The 590A1 has a strong reputation for reliability and build quality. Users regularly point to its military-grade construction, the heavy-walled barrel, and the Marinecote finish as reasons they trust it for home defense and hard use. Pump action operation is called smooth and intuitive, even under stress.

The gun accepts a wide range of accessories, and many owners customize it with lights, slings, and aftermarket stocks.

Criticism tends to focus on weight: at 7 lbs it's heavier than some alternatives in its class, which matters for extended carry. Recoil with 12 GA loads can be stout for shooters new to shotguns. A few users would prefer more stock options out of the box, and price occasionally comes up as a consideration against budget pump guns.

## Pricing

**8 offers available**

| Vendor | Price |
|--------|-------|
| Buds Gun Shop | $721.99 |
| Gritrsports Com | $729.99 |
| Grabagun Com | $759.99 |
| Palmettostatearmory Com | $767.99 |
| Gunbuyer Com | $782.87 |
| Impactguns Com | $783.99 |
| Kygunco Com | $795.99 |
| Guns Com | $809.99 |

## Similar Products

- [Mossberg 590A1 MilSpec Tactical 12GA Pump Shotgun - M-LOK, 6+1 Capacity](https://gunsnation.com/p/mossberg-590a1-milspec-tactical-12ga-pump-shotgun-m-lok-6-1-capacity/UCHGBrjA)
- [Mossberg 590A1 Tactical Pump Shotgun - 12 Ga, 18.5" Heavy Barrel](https://gunsnation.com/p/mossberg-590a1-tactical-pump-shotgun-12-ga-18-5-heavy-barrel/UCHGBrj3)
- [Mossberg 590 Tactical 20GA Pump Shotgun - 18.5" Barrel, Black](https://gunsnation.com/p/mossberg-590-tactical-20ga-pump-shotgun-18-5-barrel-black/UCHGBrYG)
- [Mossberg 500 Tactical: Reliable 12GA Pump Shotgun for Home Defense](https://gunsnation.com/p/mossberg-500-tactical-reliable-12ga-pump-shotgun-for-home-defense/UCHGBr5j)
- [Mossberg 590 Retrograde 12 GA Pump Shotgun - 18.5" Barrel Classic](https://gunsnation.com/p/mossberg-590-retrograde-12-ga-pump-shotgun-18-5-barrel-classic/UCHGBvKa)
- [Mossberg 590M: Tactical 12GA Pump Shotgun, 10+1 Rounds, 18.5" Barrel](https://gunsnation.com/p/mossberg-590m-tactical-12ga-pump-shotgun-10-1-rounds-18-5-barrel/UCHGBqGr)

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