# Sig Sauer P320 Nitron .45 ACP - Modular Semi-Auto Pistol

**Brand:** SIG Sauer
**Category:** Full Size Handguns
**Caliber:** .45 ACP

## Specifications

- **Caliber:** .45 ACP
- **Barrel Length:** 5"
- **Capacity:** 10 rounds
- **Finish:** Black
- **Weight:** 29.5 oz
- **Overall Length:** 8"
- **UPC:** 798681513451
- **SKU:** UCE3nOEgN

## Description

The Sig Sauer P320 Nitron in .45 ACP is a full-size semi-automatic pistol built around the P320's modular fire control unit, giving it the ability to change grip modules and calibers. The .45 ACP chambering and 5-inch barrel make this a deliberate choice for shooters who prioritize stopping power over round count.

### Key Specifications
- **Manufacturer:** Sig Sauer
- **Model:** P320
- **Caliber:** .45 ACP
- **Barrel Length:** 5 inches
- **Capacity:** 10 rounds
- **Weight:** 1.84 lbs (29.5 oz)
- **Frame Material:** Polymer
- **Slide Material:** Stainless Steel
- **Total Height:** 5.5 inches
- **Total Length:** 8 inches

### Detailed Features

The double-action striker mechanism gives a consistent pull across every shot. The carbon steel barrel delivers durability through extended use. Both frame and slide carry a Nitron finish, which adds corrosion resistance without adding weight. SIGLITE Night sights (front 1-Dot, rear 2-Dot) handle low-light aiming without any aftermarket work. The textured polymer grip provides a secure hold without being abrasive on the hands during longer sessions.

### Usage

The 5-inch barrel and 29.5 oz weight push this toward a home defense or duty role rather than everyday concealed carry. The .45 ACP round produces manageable recoil in this size pistol, and the 10-round capacity is a trade-off inherent to the larger cartridge. For competitive shooting, the longer barrel gives a slight velocity edge and a longer sight radius. Those who carry will want a purpose-built holster. The 8-inch overall length rules out pocket carry and makes inside-the-waistband more demanding.

## What Customers Say

*AI-generated insights from customer reviews*

Feedback on the P320 Nitron .45 ACP tends to be balanced, with clear strengths and a few genuine trade-offs.

The modular design gets consistent praise. Swapping grip sizes and calibers is straightforward, and the system's flexibility appeals to both newer shooters building skills and experienced ones who want one platform for multiple roles. Ergonomics come up positively in most discussions; the grip shape works well across hand sizes.

Accuracy and recoil management are commonly cited strengths. For a .45 ACP pistol, the P320 handles recoil without excessive muzzle flip, and most owners report a smooth trigger pull that supports accurate shooting. Reliability is generally reported as good, with few malfunctions noted over extended use.

Weight is the most common criticism. At 29.5 oz unloaded, it's heavier than many comparable options, which matters for those who carry daily. Parts compatibility within the modular system has tripped up a small number of users, not a universal issue, but worth knowing if you plan to mix components across generations.

The striker-fired, no-external-safety setup suits shooters who prefer simplicity, but it's a legitimate point of contention for those accustomed to traditional manual safeties.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $595.99 |

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