Need Help - What is MOA on an AR scope

[ted_kennedys_liver]

Have been seeing MOA mentioned quite a bit when it comes to AR style scopes and mounts. For example the Vortex Razor has a 3 MOA reticle and a 6 MOA reticle. I can see the 6 MOA dot is larger but what does that translate into? Also have seen Larue mounts that states "the mount has a 0 MOA built in cant" and "the OBR rifle has 20 MOA built-in to the upper rail"......

Is there any easy wayto explain this ?

[dclifton]

Basically on the mounts that means it has a 20 minute of angle any built in to the rail. So that way you can get 20 more MOA windage UP out of your scope. Like for example let say a scope has 40 moa of elevation adjustment. We'll the 10 or 20 or even 30 and 40 MOA rails will start you out with that much built in.
That way u use a 20 moa rail and you use less drop on ur scope. Therefore have more rise up in elevation.

On red dots alot of time 3 or 6 MOA usually means the dot size.

Moa is also the adjustment on windage and elevation for scopes. Along with MILS and MRADs.

That's was the short jist.

[ted_kennedys_liver]

So does the 6 MOA dot on the Vortex mean the dot covers 6" at 100yds?

[ted_kennedys_liver]

Basically on the mounts that means it has a 20 minute of angle any built in to the rail. So that way you can get 20 more MOA windage UP out of your scope. Like for example let say a scope has 40 moa of elevation adjustment. We'll the 10 or 20 or even 30 and 40 MOA rails will start you out with that much built in.
That way u use a 20 moa rail and you use less drop on ur scope. Therefore have more rise up in elevation.

On red dots alot of time 3 or 6 MOA usually means the dot size.

Moa is also the adjustment on windage and elevation for scopes. Along with MILS and MRADs.

That's was the short jist.

Thanks. That helps get me started.

[WCB]

The arcminute is commonly found in the firearms industry and literature, particularly concerning the accuracy of rifles, though the industry refers to it as minute of angle. It is especially popular with shooters familiar with the Imperial measurement system because 1 MOA subtends approximately one inch at 100 yards, a traditional distance on target ranges. Since most modern rifle scopes are adjustable in half (1⁄2), quarter (1⁄4), or eighth (1⁄8) MOA increments, also known as clicks, this makes zeroing and adjustments much easier. For example, if the point of impact is 3" high and 1.5" left of the point of aim at 100 yards, the scope needs to be adjusted 3 MOA down, and 1.5 MOA right. Such adjustments are trivial when the scope's adjustment dials have an MOA scale printed on them, and even figuring the right number of clicks is relatively easy on scopes that click in fractions of MOA.

[cwill]

So does the 6 MOA dot on the Vortex mean the dot covers 6" at 100yds?

I'm no expert, but that is my understanding.

[BuckTag]

So does the 6 MOA dot on the Vortex mean the dot covers 6" at 100yds?