New for 2021: Rock Island Armory STK100

by
posted on June 14, 2021
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Rock Island Armory Stk100 Pistol F

Rock Island Armory (RIA) announced the launch of its first striker-fired pistol, the STK100, in 2021, giving consumers a different take on this popular pistol concept. Unlike many competing manufacturers, RIA elected to use aluminum instead of polymer for its grip frame, which provides a different set of performance characteristics than many other options available today.

"We think shooters are going to be excited about the STK100," Armscor President and CEO Martin Tuason said. "It really does give shooters all the advantages of metal for the price of polymer. It's perfect for recreational shooting, self-defense, and even law enforcement, which makes it incredibly versatile."

Rock Island Armory STK100 left side shown on white.The grip frame is built with ergonomics in mind, with a grip angle mimicking that of a 1911 to provide a natural point of aim. Of course, being made of metal instead of polymer, the STK100 provides an added level of durability that can't be replicated by polymers. Despite the gun's metal construction, RIA saved on weight where it could, resulting in a gun that weighs 28.8 ozs., unloaded, only slightly more than many polymer-frame pistols on the market. The added weight does help shooters in some respects, though, giving them a more stable platform that absorbs recoil impulse. Additionally, the gun won't flex as much as polymer-frame models, which enables a greater degree of accuracy.

At the top end of the RIA STK100, the company also added another concession to a growing segment of the handgun market. The top-rear section of the slide features a milled slot compatible with popular red-dot optics. From the factory, the gun ships with a cover plate featuring an integrated rear sight, which prevents co-witnessing a red-dot optic with on-board sights. The slide also features generous serrations at the front and rear for easy manipulation, and lightening cuts on the top and sides of the slide reduce weight and speed up cycling for greater reliability and faster locktime.

Rock Island Armory STK100 pistol right side shown at an angle, displaying the lightening cuts in the forward portion of the slide.Chambered in 9 mm Luger, the RIA STK100 feeds from 17-round Glock pistol magazines. The pistol is equipped with a six-groove 4.5" barrel complete with a 1:16" RH twist and measures 7.91" long, 5.16" high and 1.25" wide. The trigger incorporates a blade-in safety, and from the factory, pull weight is estimated to fall between 3 to 7 lbs. The steel slide and barrel are treated with a matte-black Parkerized finish, while the aluminum frame features a matching anodized finish.

The suggested retail price on the RIA STK100 is $599. For more information, visit armscor.com.

Box of specifications on the Rock Island Armory STK100, highlighting key points on the gun, as well as its dimensions.

Latest

Wilson Combat eXperior Elite
Wilson Combat eXperior Elite

Gun Locker: Wilson Combat eXperior Elite

Wilson Combat continues its fine tradition of making excellent guns even better with its new eXperior Elite design.

The Sako 90 Grizzly: Modernity Meets Tradition

Hunting remains a largely traditional activity, and some of us just like the feel of a nice wood stock. For those purists among us, Sako has introduced its new-for-2026 Grizzly.

The Armed Citizen® July 13, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

New Digital Surveillance Tools Threaten Gun Owner Privacy

Technology contained within new digital surveillance hardware recently introduced by defense contractor Leonardo could conceivably track who has recently purchased firearm and where they're taking it.

First Look: Shell Tech Ammo Dog Bowl

The materials used in your dog’s bowl matter for all the same reasons the materials in your own water bottle matter. That's why this dog bowl from Shell Tech Ammo is worth looking at.

Pony Power: Colt Launches Optics Division with VMR Riflescopes

Colt Optics grew out of a market where military, law enforcement and civilian customers increasingly expect a firearms manufacturer to offer a complete package that goes beyond just the firearm

Interests



Get the best of American Rifleman delivered to your inbox.