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Manufacturer: Samson Manufacturing
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Sig Samson Quick Flip Front Sight with Optional Rear Sight Package
HK/A2/SP for SIG 556/556R/522
What's the difference between A2 rear and SP rear?
The A2 rear offers different distance zeros and the SP rear maintains zero for one same distance.
A2 large aperture is zeroed from 100-200 meters. When flipped to the small aperture, the zero takes into account bullet drop for standard 5.56 ammunition and is good from 300-500 meters.
SP has both peeps (large and small aperture) zeroed for the same distance. This allows quick acquistion large aperture use or finer detail slower measured shot with the smaller aperture but maintains zero at the same distance.
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