# Rock Island STK100 Ultra 9mm 4.49in Black

**Brand:** Rock Island Armory
**Category:** Semi-Automatic Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 4.49"
- **UPC:** 4806015571131
- **SKU:** UD1MbypYRX

## Description

The Rock Island STK100 Ultra is a semi-automatic 9mm pistol with a 4.49-inch barrel in black. It has an optic-ready cut and ships in a high-capacity configuration with a 17-round magazine option.

### Key Specifications
- **Brand**: Rock Island
- **Model**: STK100 Ultra
- **Caliber**: 9mm
- **Action**: Semi Auto
- **Capacity**: 17+1
- **Barrel Length**: 4.49 inches
- **Color/Finish**: Black

### Detailed Features
- 4.49-inch barrel
- Optic-ready slide cut
- 17-round magazine capacity
- Black finish
- Semi-automatic 9mm platform

## Frequently Asked Questions

**Q: What caliber is the STK100 Ultra?**

A: The Rock Island STK100 Ultra is chambered in 9mm.

**Q: Who makes the STK100 Ultra?**

A: The STK100 Ultra is made by Rock Island Armory.

**Q: What type of firearm is the STK100 Ultra?**

A: It is a semi-automatic handgun with a 4.49-inch barrel.

**Q: Is the STK100 Ultra optic-ready?**

A: Yes. The STK100 Ultra has an optic-ready slide cut.

**Q: How many rounds does the STK100 Ultra hold?**

A: The STK100 Ultra ships with a 17-round magazine, giving a total capacity of 17+1.

**Q: Where can I buy the STK100 Ultra?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the Rock Island STK100 Ultra consistently bring up value in their feedback. The optic-ready cut at this price point is a genuine differentiator and gets positive attention from buyers who want a slide-mounted red dot without paying for a separate milling service.

Reliability gets generally favorable marks in early ownership, though some owners note that the pistol prefers standard pressure 9mm over lighter loads during break-in. The trigger on the STK100 Ultra splits opinion, with some finding it acceptable for a duty-style pistol and others wishing for a shorter reset.

The 17-round capacity and black finish are straightforward pluses for everyday carry or home defense buyers. Longer-term durability data in owner communities is still accumulating, and a minority of users flag fit and finish inconsistencies, which is a common complaint across the Rock Island lineup at its price tier.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $399.99 |

## Similar Products

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