![]() ![]() When choosing a rifle scope or other type of optical sight for your AR-15, the reticle design can play an important role in your shooting experience. The second focal plane will have the reticle remain fixed in size, regardless of the magnification setting. You need to find the best balance between your sight reticle remaining visible without obscuring the target or the target’s vitals.ĭo you prefer your reticle to be at the first or second focal plane? If you prefer your reticle to change size as you magnify the target image, choose the first focal plane. Fine crosshairs with no thick outer lines can be challenging to acquire under certain lighting conditions or when shooting in an environment with poor contrast. Thick crosshair lines that taper toward the center draw your eye toward the aiming point. Subtension refers to the thickness or weight of the crosshair lines. That’s why subtension is important to consider. Many of them are illuminated and translucent. This dot may be alone or surrounded by additional markers. The dot reticle consists of a red, green, or amber dot or enclosed circle in the center of the sighting system. Some BDC reticles also have a rangefinder grid to help you estimate distance based on known information regarding the target or environment. BDC ReticleĪ BDC, or bullet drop compensator, reticle allows you to predict the trajectory of the bullet by providing holdover reference points. ![]() The center lines are fine and don’t obscure the target for more precise aiming, especially as the distance to the target increases. The outside lines of the crosshairs are thicker, allowing your eye to naturally determine where to place the center. Duplex ReticleĪ duplex reticle comprises four black lines that taper toward the center. Standard crosshairs may also include a thickened center, center dot, or other marker for additional reference or visibility. You place the center of the reticle, where the two lines converge, on the target. The original crosshair, or rifle scope reticle, consists of two black intersecting lines - one vertical and one horizontal. These allow you to identify targets at night by amplifying ambient light or detecting infrared radiation. You can find relatively affordable thermal-imaging and night-vision rifle scopes for your AR-15. Alternatively, the illumination may be provided by a battery-powered LED, the brightness of which is user-adjustable. The radioactive decay of tritium, a hydrogen isotope, releases electrons that produce a green glow when interacting with a phosphor material. Fiber optics collect and transmit ambient light, illuminating the reticle during daylight hours. The source of illumination may be fiber optics, a lithium battery, the radioactive decay of tritium, or some combination thereof. An illuminated reticle can allow you to acquire a sight picture and track targets rapidly. Some low-power variable optics, especially those using the Bindon Aiming Concept, feature a brightly illuminated reticle or aiming marker. ![]()
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