Rock Island Armory STK100
Full-Size Pistol · Striker · 4.5″ Barrel · Optics-Ready
Caliber: 9mm Luger
Optic mount: Docter / Noblex Footprint · Pistol Picatinny Rail
Effective Range: Close quarters (~0–50 yd)
Drop chart: 9mm Luger
The Rock Island Armory STK100 is compatible with 8 optics and 19 weapon lights in our catalog, and it's optics-ready — each one below shows exactly how it mounts.
Updated
Compatible Optics
(8)
8 compatible optics in our catalog.
8 of 8 optics
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.
Compatible Lights
(19)
19 weapon lights that mount on the Rock Island Armory STK100, ranked by how well each suits its job.
19 of 19 lights
- Fenix GL19R V2.0Ideal
1,200 lm · 44,300 cd · Balanced · ~421 m throw
Where to buy≈ $132 MSRP - Holosun P.ID HCIdeal
800 lm · 42,000 cd · Throw · ~410 m throw
Where to buy≈ $200 MSRP - Holosun P.IDIdeal
1,000 lm · 23,000 cd · Balanced · ~303 m throw · Strobe
Where to buy≈ $180 MSRP - SIG Sauer Foxtrot2RIdeal
700 lm · 20,000 cd · Balanced · ~283 m throw
Where to buy≈ $150 MSRP - Streamlight TLR-1 HL-XIdeal
1,000 lm · 15,000 cd · Flood · ~245 m throw · Strobe
Where to buy≈ $230 MSRP - SureFire X300 TurboWorkable
650 lm · 66,000 cd · Throw · ~514 m throw
Where to buy≈ $369 MSRP - Streamlight TLR-1 HPWorkable
1,000 lm · 65,000 cd · Throw · ~510 m throw
Where to buy≈ $160 MSRP - Modlite PL350Workable
1,350 lm · 54,000 cd · Balanced · ~465 m throw
Where to buy≈ $329 MSRP - Cloud Defensive EPL DutyWorkable
1,200 lm · 52,000 cd · Balanced · ~456 m throw
Where to buy≈ $300 MSRP - Olight Baldr ProWorkable
1,350 lm · 16,900 cd · Flood · ~260 m throw
Where to buy≈ $130 MSRP - Streamlight TLR-1Workable
300 lm · 12,000 cd · Balanced · ~219 m throw
Where to buy≈ $130 MSRP - SureFire X300U-AWorkable
1,000 lm · 11,300 cd · Flood · ~213 m throw
Where to buy≈ $329 MSRP - Streamlight TLR-9Workable
1,000 lm · 10,000 cd · Flood · ~200 m throw · Strobe
Where to buy≈ $190 MSRP - Nightstick TWM-30Workable
1,200 lm · 9,379 cd · Flood · ~194 m throw · Strobe
Where to buy≈ $147 MSRP - Streamlight TLR-7 XWorkable
500 lm · 5,000 cd · Flood · ~141 m throw · Strobe
Where to buy≈ $254 MSRP - Streamlight TLR-7 AWorkable
500 lm · 5,000 cd · Flood · ~141 m throw · Strobe
Where to buy≈ $150 MSRP - Streamlight TLR-VIR IIWorkable
300 lm · 5,000 cd · Flood · ~141 m throw · IR
Where to buy≈ $600 MSRP - Olight PL-Mini 2 ValkyrieWorkable
600 lm · 4,225 cd · Flood · ~130 m throw
Where to buy≈ $90 MSRP - SureFire XSCWorkable
350 lm · 2,000 cd · Flood · ~89 m throw
Where to buy≈ $329 MSRP
Lights mount on the gun's accessory rail — fitment is near-universal, so the grade reflects flood-vs-throw fit for this gun's use, not whether it bolts on.
Compatible Lasers
(11)
11 lasers that mount on the Rock Island Armory STK100. Lasers are situational — an IR aiming laser or illuminator earns its place with night vision (it does what a red dot can't), and a visible laser is a real aiming aid on a carry gun with no optic, though largely redundant once you mount a dot. Tagged by the role each fills, not graded.
11 of 11 lasers
- Holosun RMLt-IRNight Vision
IR aiming · 1.3 oz
Where to buy≈ $153 MSRP - Holosun RML-RDVisible Aiming
Red aiming · 1.3 oz
Where to buy≈ $106 MSRP - LaserMax SpartanVisible Aiming
Red aiming · 1.2 oz
Where to buy≈ $110 MSRP - Olight Baldr MiniVisible Aiming
Green aiming · 600 lm light · 3.07 oz
Where to buy≈ $125 MSRP - Crimson Trace CMR-201 Rail MasterVisible Aiming
Red aiming · 1 oz
Where to buy≈ $129 MSRP - Olight Baldr Pro RVisible Aiming
Green aiming · 1,350 lm light · 4.44 oz
Where to buy≈ $170 MSRP - Crimson Trace CMR-206 Rail MasterVisible Aiming
Green aiming · 1 oz
Where to buy≈ $199 MSRP - Streamlight TLR-8 XVisible Aiming
Red aiming · 500 lm light · 2.6 oz
Where to buy≈ $270 MSRP - Viridian X5L Gen 3Visible Aiming
Green aiming · 500 lm light · 2.5 oz
Where to buy≈ $329 MSRP - Streamlight TLR-8 X GVisible Aiming
Green aiming · 500 lm light · 2.7 oz
Where to buy≈ $340 MSRP - Steiner TOR MiniVisible Aiming
Green aiming · 2.1 oz
Where to buy≈ $345 MSRP
Civilian-legal units only (eye-safe IR). Fitment is the rail; whether you need one depends on your setup, so these are positioned by role rather than scored.
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 / Pistol Picatinny Rail. 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.