# Maxim Defense PDX: Tactical 5.56 NATO Compact Semi-Auto Pistol

**Brand:** Maxim Defense
**Category:** Full Size Handguns
**Caliber:** 5.56 NATO

## Specifications

- **Caliber:** 5.56 NATO
- **Barrel Length:** 5.5"
- **Capacity:** 20 rounds
- **Weight:** 94.4 oz
- **Overall Length:** 18.75"
- **UPC:** 680017508418
- **SKU:** UCByGiADK

## Description

The Maxim Defense SPS 505 PDX is a semi-automatic pistol chambered in 5.56 NATO (also accepts .223 Rem) with a 5.5-inch barrel and 20+1 capacity. It weighs 5.9 lbs with an aluminum frame and gray finish.

### Key Specifications
- **Manufacturer:** Maxim Defense Industries
- **Model:** SPS 505 PDX
- **Type:** Semi-Auto Handgun - Tactical
- **Caliber:** 5.56 NATO (accepts .223 Rem)
- **Barrel Length:** 5.5 inches
- **Overall Length:** 18.75 inches
- **Capacity:** 20+1 rounds
- **Weight:** 5.9 lbs (2.67 kg)
- **Finish Color:** Gray
- **Frame Material:** Aluminum

### Features

The HATEBRAKE muzzle booster reduces recoil and keeps the gas-operated action cycling reliably on the short 5.5-inch barrel. The full-length Picatinny top rail is flat-top and optics-ready out of the box. The M-Slot compatible handguard accepts standard accessories.

The rear single-point QD sling mount is built in. The SCW sub-compact weapon system uses an Urban Grey polymer grip. Maxim rates this at 2 MOA accuracy. The 18.75-inch overall length and 5.56 NATO chambering give it useful range for a pistol-platform firearm.

## Frequently Asked Questions

**Q: What caliber is the Maxim Defense SPS 505 PDX?**

A: It is chambered in 5.56 NATO and also accepts .223 Rem.

**Q: What type of firearm is the Maxim Defense SPS 505 PDX?**

A: It is a semi-automatic pistol with an aluminum frame.

**Q: Who makes the SPS 505 PDX?**

A: Maxim Defense Industries makes the SPS 505 PDX.

**Q: What is the barrel length of the Maxim Defense SPS 505 PDX?**

A: It has a 5.5-inch barrel.

**Q: How many rounds does the Maxim Defense SPS 505 PDX hold?**

A: It has a 20+1 capacity.

**Q: Is the Maxim Defense SPS 505 PDX optic-ready?**

A: Yes, it has a full-length Picatinny top rail and is optic-ready out of the box.

**Q: Where can I buy the Maxim Defense SPS 505 PDX?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

The Maxim Defense PDX gets strong marks from owners who prioritize compact form with rifle-caliber performance.

Build quality is the most consistent praise. The aluminum construction and overall fit feel on par with the price tier. Reliability in firing sessions is generally reported as solid, and the adjustable brace is well-received for fit customization.

Price is the most common objection. The PDX sits at a premium compared to other 5.56 pistol platforms, and buyers debate whether the Maxim-specific features justify the cost differential. Weight at 5.9 lbs runs heavier than some expect for a compact pistol, though most owners adapt to it. Recoil management with the HATEBRAKE is considered adequate by experienced shooters; newer shooters occasionally mention that rapid-fire control takes practice.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $2599.99 |

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