Mount your Nabila red dot sight on a 20 mm rail and tailor the illuminated reticle to your view, with features varying by model.
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Rail fit and adjustment: All three models fit a 20 mm rail; 551 and 553 have side elevation and leverage adjustments, while 552 offers 1/2-MOA windage and elevation clicks.
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Reticle options: On 551, adjust brightness and switch between red and green; 552 adds five brightness levels, 1.0× magnification and a 30 × 22 mm objective lens.
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Size and weight: 551 measures 10 × 5 × 6 cm and weighs 220 g; 552 measures 130 × 50 × 65 mm and weighs 275 g; 553 weighs 300 g.
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Power and protection: 551 takes four LR44 batteries, has a two-hour automatic shutoff and an IPX7 rating; 552 takes two AA batteries, and 553 takes one CR123A and is shockproof and weatherproof. Batteries are not included.
