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The AR-15 is the most-optic'd rifle in America, and the "best" setup depends entirely on your distances and role. Three approaches cover almost everyone — and the right one is decided by a single hone … read more

Co-witnessing means setting your iron sights at a height where you can see and use them through a red dot window. It gives you a fallback if the optic fails and, just as usefully, a built-in reference … read more

Reflex red dots come in two structural types, and the difference matters most when conditions get ugly. Compare both across red dot sights. Open emitter An open-emitter optic has an exposed LED that … read more

SIG Sauer's ROMEO series is one of the broadest red dot lineups on the market, which makes it powerful but a little confusing. Sorting it by role makes the choice simple. Browse them in SIG Sauer red … read more

Three optic types compete for the front of a carbine, and the prism scope is the one buyers understand least — partly because it sits awkwardly between the other two, and partly because its real advan … read more