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Scopes to Fit Picatinny Rail for AR-Style Rifles

AR-style rifles are based on the design of the M-16 assault rifle used by the U.S. military. There are numerous variations of AR-style rifles, many of which have rail mounts built into the top of the upper. Those without rail mounts have carry handles designed to accept rail mount attachments. Many scopes (which are designed for use with AR type rifles) have rail-style scope rings built into their design; others need to have scope rings attached.

Variable Power
- Variable-power scopes are the most commonly used scopes in the shooting world, not only among AR-type rifles but firearms in general. These scopes feature adjustable magnification ranges and are practical for a variety of shooting distances. Scopes for AR-type rifles typically feature mil-dots on the cross hairs, which can also be used for determining the distance to your target.
Fixed Power
- Fixed-power scopes are set to a specific magnification and are generally used for short- to medium-range targets. The fixed-power scope most commonly used with AR-type rifles is a 4-power scope, but greater-powered scopes are available if desired. These scopes are available in a variety of configurations, including scopes with additional rail mounts on the exterior of the scope tube; these additional rail mounts are practical for mounting accessories such as flashlights or lasers.
Red Dot
- Red dot scopes were originally designed for AR-type rifles and typically have rail mounting rings built into the body of the scope. Red dots scopes are battery powered and have no magnification qualities. The scope operates by producing a red LED light, representing the aiming point, in the center of the viewfinder that is only visible to the shooter. These scopes are particularly practical for short-range shooting and quick target acquisition.
Holographic
- Holographic sights are built specifically to be installed on a rail mount. The sights feature a single vertical window that displays a holographic reticle. These sights require batteries and are practical for short-range targets. The advantages of holographic sights are that they operate well in varying light conditions and that they have reticles that can be seen at different angles (unlike a conventional scope, which requires you to look straight through the tube).

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