Independent field journal · Practice, evidence, judgmentIssue No. 01 / Summer 2026
KGKNOWN GROUNDClarity and capability in a contested world
Newsletter
Interactive research

Compare like with like.

Start with a product family, then choose two records. Differences, sources, and documentation gaps stay visible.

Step 1

Choose what you are comparing

Compare full-size and compact handgun-mounted optics.

Step 2

Select two pistol optics

Step 3

Review the differences

“Not documented” means Known Ground has not verified that field. It is not a zero, “none,” or compatibility claim.

Side-by-side comparison of RCR and ACRO P-2
AttributeTrijiconRCRSpecs checked Jul 23, 2026AimpointACRO P-2Specs checked Jul 23, 2026
Typical priceNot documentedNot documented
Weight1.95 oz / 55 g with battery2.2 oz / 61 g
Overall dimensions1.8 × 1.2 × 1.3 in1.9 × 1.3 × 1.2 in / 47 × 33 × 31 mm
Product formatopticoptic
Mount / compatibilityRMR-pattern interface using RCR capstan hardwareAimpoint ACRO interface
Catalog statuscurrentcurrent
Adjustment1 MOA per clickNot documented
Adjustment range150 MOA total travelNot documented
BatteryTop-loading CR2032CR2032
Battery lifeMore than 6 years at setting 550,000 hours at daylight setting 6
Brightness10 settings, including 3 night-vision and 1 super-bright4 night-vision and 6 daylight settings
Clear apertureNot documented0.59 × 0.59 in / 15 × 15 mm
DesignEnclosed emitterEnclosed emitter
Eye reliefUnlimitedUnlimited
Housing7075-T6 forged aluminumHigh-strength aluminum
LensTempered glassNot documented
Magnification
ParallaxNot documentedOperationally parallax-free
Reticle3.25 MOA red dot2.5, 3.5, or 9 MOA red dot, depending on model
Water resistance66 ft / 20 mSubmersible to 115 ft / 35 m
Window0.88 × 0.64 inNot documented
Editorial context

Choose by use case, not scoreboard.

RCR: Enclosed duty-focused reflex optic.

ACRO P-2: Enclosed duty-focused reflex optic.