Rock Island Armory STK100
Full-Size Pistol · Striker · 4.5″ Barrel · Optics-Ready
Caliber: 9mm Luger
Optic footprint: Docter / Noblex
Effective Range: Close quarters (~0–50 yd)
Drop chart: 9mm Luger
The Rock Island Armory STK100 is compatible with 8 optics in our catalog, and it's optics-ready — each one below shows exactly how it mounts.
Updated
Compatible Optics
8 compatible optics in our catalog.
Showing 8 of 8
Red dots & reflex sights (8)
1x, no magnification — fast target acquisition up close.
- Burris FastFire 3Direct Fit
8 MOA dot · Open · 1.5 oz
Where to buy≈ $299 MSRP - Burris FastFire 4Direct Fit
3 MOA dot · Open · 26k-hr battery · 1.6 oz
Where to buy≈ $419 MSRP - Crimson Trace CT RADDirect Fit
3 MOA dot · Open · 20k-hr battery · 1 oz
Where to buy≈ $242 MSRP - Crimson Trace CT RAD ProDirect Fit
3 MOA dot · Open · 20k-hr battery · 1.6 oz
Where to buy≈ $297 MSRP - Crimson Trace CTS-1250Direct Fit
3.25 MOA dot · Open · 20k-hr battery · 1.6 oz
Where to buy≈ $260 MSRP - Meprolight MicroRDSDirect Fit
3 MOA dot · Open · 1.3 oz
Where to buy≈ $350 MSRP - Vortex VenomDirect Fit
6 MOA dot · Open · 3k-hr battery · 1.1 oz
Where to buy≈ $280 MSRP - Vortex ViperDirect Fit
6 MOA dot · Open · 30k-hr battery · 1.03 oz
Where to buy≈ $250 MSRP
Suitability is general guidance based on the platform's typical effective range — not a hard rule. Your load, optic, and intended use may shift it.
Related firearms
Others in the same class — each links to its own compatible-optics list.
Common questions
- What optics fit the Rock Island Armory STK100?
- 8 optics in our catalog are confirmed to fit the Rock Island Armory STK100. Each is listed with exactly how it mounts — directly on the gun's rail or slide cut, or with the specific adapter plate it needs.
- Is the Rock Island Armory STK100 optics-ready?
- Yes. The Rock Island Armory STK100 is optics-ready — it uses the Docter / Noblex Footprint. The compatible optics mount to its factory cut or rail, and each listing shows the plate or mount it uses.
- What is the effective range of the Rock Island Armory STK100?
- In 9mm Luger, the Rock Island Armory STK100's typical effective range is Close quarters (~0–50 yd). See its drop chart for holdovers at distance.