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Compare full-size and compact handgun-mounted optics.
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Select two pistol optics
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“Not documented” means Known Ground has not verified that field. It is not a zero, “none,” or compatibility claim.
| Attribute | SteinerMPSSpecs checked Aug 1, 2026 | AimpointACRO P-2Specs checked Aug 5, 2026 |
|---|---|---|
| Typical price | Not documented | Not documented |
| Weight | 2.05 oz / 58 g | 2.2 oz / 61 g |
| Overall dimensions | 1.77 × 1.24 × 1.20 in / 45 × 31.5 × 30.5 mm | 1.9 × 1.3 × 1.2 in / 47 × 33 × 31 mm |
| Product format | optic | optic |
| Mount / compatibility | Aimpoint ACRO interface | Aimpoint ACRO interface |
| Catalog status | current | current |
| Adjustment | 1 MOA per click | Not documented |
| Adjustment range | 90 MOA elevation and windage | Not documented |
| Battery | CR1632 | CR2032 |
| Battery life | 13,000 hours at medium setting | 50,000 hours at daylight setting 6 |
| Brightness | 6 daylight and 2 night-vision settings | 4 night-vision and 6 daylight settings |
| Clear aperture | Not documented | 0.59 × 0.59 in / 15 × 15 mm |
| Design | Enclosed emitter | Enclosed emitter |
| Eye relief | Not documented | Unlimited |
| Housing | Not documented | High-strength aluminum |
| Magnification | 1× | 1× |
| Operating temperature | -40°F to 140°F / -40°C to 60°C | Not documented |
| Parallax | Not documented | Operationally parallax-free |
| Parallax setting | 25 m | Not documented |
| Reticle | 3.3 MOA red dot | 3.5 MOA red dot |
| Water resistance | Submersible to 33 ft / 10 m | Submersible to 115 ft / 35 m |
| Window | 0.79 × 0.63 in / 20 × 16 mm | Not documented |
Editorial context
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MPS: The Steiner MPS is a 1× enclosed-emitter pistol sight built around a 3.3 MOA red dot and a 20 × 16 mm viewing window. Steiner documents eight manual brightness settings (six daylight and two night-vision), a top-accessible CR1632 battery rated for 13,000 hours at medium brightness, a 2.05 oz weight, and an ACRO-platform mounting interface. This is a manufacturer-sourced research record; Known Ground has not marked it as personally tested.
ACRO P-2: The Aimpoint ACRO P-2 is a 1× enclosed-emitter reflex sight with a 3.5 MOA red dot. Aimpoint documents a high-strength aluminum housing, a CR2032 battery rated for 50,000 hours at daylight setting 6, four night-vision and six daylight settings, a 15 × 15 mm clear aperture, a 2.2 oz weight, and submersion to 35 m. This is a manufacturer-sourced research record; Known Ground has not marked it as personally tested.
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