Rock Island STK100 Pistol 9mm 4.5 in. Black 10 rd.

Description

Rock Island STK100 Pistol 9mm 4.5 in. Black 10 rd.

The Rock Island STK100 Pistol 9mm 4.5 in. Black 10 rd. delivers a striker-fired platform built for reliable range work and practical carry. With a 4.5-inch barrel and ten-round magazine, this pistol gives you a solid grip and a crisp trigger pull right out of the box. Per Rock Island Armory specs, the textured aluminum grips keep your hand locked in place, and the Picatinny rail lets you mount a light or laser without fuss. It’s a straight shooter for folks who want a modern handgun without the fancy price tag.

Manufacturer	Rock Island Armory (RIA)
Model	STK100
Material	Steel slide, aluminum frame
Compatibility	9mm Luger ammunition
Finish	Black oxide slide, black anodized frame (per manufacturer specs)
Weight	26.4 oz. unloaded (approximate per manufacturer)
Condition	New

Key Features

• Striker-Fired Action — WHY IT MATTERS: Gives you a consistent trigger pull every time, no hammer to snag on cover garments, and a fast reset for follow-up shots on clays or steel.
• 4.5-Inch Barrel — WHY IT MATTERS: Adds velocity for flatter trajectory at the range and keeps the slide cycle smooth, reducing muzzle flip for quicker target reacquisition.
• Black Textured Aluminum Grips — WHY IT MATTERS: Provides a non-slip surface even with sweaty hands in the South Carolina heat, and the aluminum construction sheds weight without sacrificing strength.
• Picatinny Rail — WHY IT MATTERS: Lets you attach a weapon light or laser for low-light defense or hog hunting, expanding the pistol’s utility beyond daylight hours.
• 10-Round Magazine — WHY IT MATTERS: Keeps you compliant in restricted states while still offering enough capacity for a box of practice ammo without constant reloads.

Who It’s For

This Rock Island STK100 is built for the Southern shooter who wants a reliable 9mm for the range, truck glovebox, or home defense. It suits the bird hunter who needs a sidearm for snakes and varmints, the weekend paper-puncher, and the concealed carrier looking for a budget-friendly option that doesn’t cut corners on function. If you value a solid grip and a clean trigger over flashy logos, this pistol fits right in.

Pros and Cons

Pros

• Reliable striker-fired action with a smooth trigger pull
• Lightweight aluminum frame for all-day carry comfort
• Picatinny rail for accessory mounting
• Affordable price point for a full-size 9mm
• Textured grips improve control in wet or sweaty conditions

Cons

• 10-round magazine capacity may feel limited for some shooters; aftermarket extended mags are not yet widely available for this model
• Slide finish shows holster wear over time, so plan for routine maintenance

Comparison

Feature	Rock Island STK100	Zev Technologies OZ9	Lone Wolf Distributors Timberwolf
MSRP	$499	$1,800+	$650
Barrel Length	4.5 in.	4.5 in.	4.6 in.
Frame Material	Aluminum	Polymer	Polymer
Trigger	Striker-fired, ~5.5 lb	Striker-fired, adjustable	Striker-fired, ~5 lb
Magazine Capacity	10 rounds	17 rounds	15 rounds
Overall Value	Excellent for budget	Premium custom	Good mid-range

The STK100 holds its own against the Zev OZ9 and Lone Wolf Timberwolf. While the OZ9 offers more customization and higher capacity, it costs three times as much. The Timberwolf is a solid competitor but lacks the aluminum frame. For the price, the STK100 delivers a metal-framed pistol that shoots flat and feels solid in the hand.

Video

We skipped the video section here, but you can browse our other product pages for hands-on demonstrations of similar firearms.

FAQ

What is the magazine capacity of the Rock Island STK100?

The Rock Island STK100 comes with a 10-round magazine. This is standard for the model and complies with many state restrictions while still being practical for range use and home defense.

Does the STK100 have a Picatinny rail?

Yes, the STK100 features a Picatinny rail on the underside of the frame. It accepts standard lights, lasers, and other accessories without adapters.

What kind of trigger does the STK100 use?

It uses a striker-fired trigger system with a smooth pull weight of approximately 5.5 pounds. The trigger has a short reset, which helps with quick follow-up shots.

Is the Rock Island STK100 suitable for concealed carry?

With its 4.5-inch barrel and full-size grip, the STK100 is better suited for open carry or range use than deep concealment. However, with a quality holster and a cover garment, it can be carried comfortably for those who prefer a larger pistol.

Can I use +P ammunition in the STK100?

Per Rock Island Armory, the STK100 is rated for standard-pressure 9mm ammunition. While it can handle occasional +P loads, we recommend sticking with standard-pressure ammo for reliability and to reduce wear on the firearm.

✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
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Related categories: Semi Auto Handguns | Rock Island Armory | 9mm Pistols

Last updated: April 2026