# Rock Island STK100 Optic-Ready 9mm Tactical Pistol: Black

**Brand:** Rock Island Armory
**Category:** Full Size Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 4.5"
- **Capacity:** 17 rounds
- **Finish:** Black Anodized
- **Weight:** 28.8 oz
- **Overall Length:** 7.9"
- **UPC:** 4806015566250
- **SKU:** UD1MbypXAo

## Description

The Rock Island Armory STK100 is a semi-automatic pistol chambered in 9mm Luger with a 4.5-inch barrel, 17+1 capacity, and a weight of 28.8 oz. The frame and slide are both black anodized aluminum. The slide has an optic cut and serrations. Sights are fixed 3-dot. The frame has a beavertail, lightening cuts, and a Picatinny rail. Action is DA/SA.

### Key Specifications
- **Model:** STK100
- **Caliber:** 9mm Luger (9x19 Para)
- **Barrel Length:** 4.5 inches
- **Overall Length:** 7.9 inches
- **Capacity:** 17+1 rounds
- **Weight:** 28.8 oz
- **Frame Material:** Aluminum, Black Anodized
- **Slide Material:** Aluminum, Black Anodized
- **Sights:** Fixed 3-dot
- **Action:** DA/SA
- **Rail:** Picatinny

### Features
The aluminum frame is the differentiating detail here. Most pistols in this class use polymer. The aluminum construction adds rigidity and a different feel in the hand, and the lightening cuts keep the weight manageable at 28.8 oz.

The optic-ready slide accepts a red dot without an adapter plate. The Picatinny rail accommodates lights and lasers. Fixed 3-dot sights are usable as backup when running an optic.

The DA/SA action requires familiarization. The first shot double-action pull is heavier than subsequent single-action pulls. Shooters coming from striker-fired pistols will need to adjust their trigger management.

## Frequently Asked Questions

**Q: What caliber is the Rock Island Armory STK100?**

A: The STK100 is chambered in 9mm Luger.

**Q: Who makes the STK100?**

A: It is made by Rock Island Armory.

**Q: What is the barrel length of the Rock Island Armory STK100?**

A: It has a 4.5-inch barrel.

**Q: How many rounds does the Rock Island Armory STK100 hold?**

A: It has a 17+1 capacity.

**Q: What type of firearm is the Rock Island Armory STK100?**

A: It is a full-size semi-automatic pistol with a DA/SA action and an aluminum frame and slide, both black anodized.

**Q: Is the Rock Island Armory STK100 optic-ready?**

A: Yes. The slide has an optic cut for a direct-mount red dot.

**Q: Where can I buy the Rock Island Armory STK100?**

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.*

> Rock island armory has been making 1911s for decades and for a budget 1911 they're some of the best on the market.
>
> — [sootch00](https://www.youtube.com/watch?v=Ac3ntBWIG7s&t=67s)

> It's better than the glock it's not incredible or anything it's not like a ppq or a vp9 trigger.
>
> — [sootch00](https://www.youtube.com/watch?v=Ac3ntBWIG7s&t=508s)

> It's heavy but first pro is that it's weighty to give you better recoil management.
>
> — [sootch00](https://www.youtube.com/watch?v=Ac3ntBWIG7s&t=883s)

> Another con to me is while they do have the optics ready which is big you know the sight is mounted to the plate.
>
> — [sootch00](https://www.youtube.com/watch?v=Ac3ntBWIG7s&t=911s)

> I think this is a real winner a real winner like my chicken dinner.
>
> — [sootch00](https://www.youtube.com/watch?v=Ac3ntBWIG7s&t=1040s)

## What Customers Say

*AI-generated insights from customer reviews*

The Rock Island STK100 gets broadly positive reviews given its price point, with the aluminum frame and optic-ready slide drawing the most interest.

Value is the most frequently cited strength. Buyers report solid build quality and reliable function at range sessions, and the aluminum frame is seen as a genuine differentiator from the sea of polymer-framed competitors at similar prices. The optic-ready slide is popular. Many owners mount a red dot and use the fixed sights as backup.

Ergonomics get mixed marks. Grip texture and overall feel vary by hand size, and some users suggest the grip could be improved. The DA/SA action is well-regarded by those familiar with the manual of arms, but occasionally mentioned as a learning curve for newer shooters.

Break-in period comes up in several reviews. Some owners note the pistol benefited from 100-200 rounds before achieving consistent reliability. Customer service experiences with Rock Island vary, and parts availability is flagged as a concern for some owners.

## Pricing

**5 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $349.99 |
| Buds Gun Shop | $429.99 |
| Grabagun Com | $449.99 |
| Shootingsurplus Com | $498.00 |
| Guns Com | $499.99 |

## Similar Products

- [Rock Island STK100: Precision 9mm Striker-Fired Handgun](https://gunsnation.com/p/rock-island-stk100-precision-9mm-striker-fired-handgun/UCEIe1Bx0)
- [Rock Island STK100 9MM Pistol - 17 Rounds, Black Finish](https://gunsnation.com/p/rock-island-stk100-9mm-pistol-17-rounds-black-finish/UCEBnjAqY)
- [Rock Island RIA 5.0E Optic-Ready 9mm Pistol - Black, 17+1 Capacity](https://gunsnation.com/p/rock-island-ria-5-0e-optic-ready-9mm-pistol-black-17-1-capacity/UCEIe1CUJ)
- [Rock Island MK9 Melik: 9mm Semi-Auto, Versatile & Reliable Pistol](https://gunsnation.com/p/rock-island-mk9-melik-9mm-semi-auto-versatile-reliable-pistol/UCEIe1CWy)
- [Rock Island Armory Stainless CS Rock 9mm Pistol](https://gunsnation.com/p/rock-island-armory-stainless-cs-rock-9mm-pistol/UD1MbypXhk)
- [Rock Island Rock Standard 1911 - 9mm Parkerized Pistol](https://gunsnation.com/p/rock-island-rock-standard-1911-9mm-parkerized-pistol/UD1MbypKBX)

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