Back up sights are manual iron posts that let you aim if your red dot loses power or cracks. See how they work through optic glass and when you need a set.

A canted sight sits at an angle beside your rifle scope so you can tilt the gun for close-range shots. Check how aiming works and whether you need one.

A diopter sight is an iron sight that sharpens your target view through a tiny rear peephole without glass. See how it works and why it differs from a red dot.

A peep sight is a small rear ring that centers your eye to prevent stray misses. It steadies aim on bows and rifles while balancing light against precision.

A ghost ring sight uses a wide rear opening that blurs as you aim, letting your eye center the front post naturally. See how it works and when to use one.

A rear sight sits closest to your eye to center the front post on target. See how notch and peep styles work, fix off-center hits, and pair with a red dot.

Iron sights are physical aiming tools that need no batteries. See how to align the front post and rear notch, and how to use them as reliable red dot backups.

A collimator sight uses curved glass to project an aiming dot that stays on target. Understand how it works and why common red dots are the same tool.

An RMR is a compact red dot sight and a standard mounting screw pattern. See how the optic shape and slide cut work together to verify pistol fit.

A holographic sight uses a laser to float an aiming reticle on your target. It handles astigmatism better than a red dot and helps you spot cheap LED clones.

A reflex sight reflects an aiming dot off curved glass so you can shoot with both eyes open. Open windows give wide views, while enclosed tubes block debris.

A red dot sight bounces a lit dot off glass to create a fast aiming point. Aim with both eyes open without projecting a laser beam or lining up iron sights.

Turn the top screw to adjust height and the side screw for left or right aim. Use gentle quarter-turns to zero your dot without stripping the fragile threads.

Adjust and zero your laser sight safely. Locate the two adjustment screws, make gentle turns to shift the beam, and avoid stripping delicate internal threads.

Zero your laser sight by walking the dot directly onto bullet holes. Turn each adjustment screw the right way to lock in your aim without wasting ammunition.

Turn each dial the correct way, loosen rear lock screws first, and center your red dot quickly without wasting ammo or stripping delicate threads.

Turn the top screw for up-and-down aim and the side screw for left or right. Learn which way to rotate dials to zero your shots without wasting range ammo.

Press the button behind the lens to cycle brightness, and use a 0.050-inch wrench to dial in your aim without stripping the delicate adjustment screws.

Turn top and side dials the right way to move bullet holes to your aim point. Follow the arrows, count your clicks, and set brightness to zero in fewer rounds.

Turn your EOTECH side dials with a coin to shift bullet impact half an inch per click at 100 yards. Zero your sight fast without guessing or wasting ammo.