A . 83 inch riser mount will give you absolute co-witness with standard height AR sights. A 1-inch riser mount will provide you with a lower 1/3 co-witness.
What does lower 1/3 Cowitness mean?
Lower 1/3 cowitness – optic is mounted slightly higher than the iron sights or about 2.8″ above center of the bore.
Are all ar iron sights the same height?
AR 15 Iron sights come in a couple of different configurations, based on the height of the sights. The basic concept is – you need the front and rear sights to be the same height if you want to hit the target.
How tall is 1/3 Cowitness mount?
There are 3 popular center heights, as picture 0 shows, one is 36mm(1.4″)—Absolute co-witness; one is 40.4mm(1.6 “)— Lower 1/3 co-witness; the other one is 38.1mm(15”).
What is a red dot riser for?
The Monstrum Tactical low profile riser mount is designed for use with red dots, sights, and other optics, allowing for sight clearance of front sights. 0.5 inch high with a Picatinny standard rail mount, it will accommodate Picatinny or Weaver standard red dots, scopes, and other optics.
What is the standard AR sight height?
Sight Heights A standard AR sight plane is 2.6 inches above the bore, the height of an M4’s front sight base. Whether rail or barrel mounted, standard height AR/M4 sights line up with this sight plane. Any standard-height sight should work with any other standard-height sight, as well as a standard front sight base.
Should you co witness a red dot pistol?
“But they should not have an absolute co-witness with your red dot. You’re negating a good portion of the benefits of having a red dot if you try to make a red dot line up exactly with your irons. ” Jedlinski agrees: “I recommend having iron sights of some kind on any pistol with a red dot. Red dots can fail.
What is a lower 1/3 cowitness?
Lower 1/3 cowitness – optic is mounted slightly higher than the iron sights or about 2.8″ above center of the bore There are advantages and disadvantages of each type of cowitness, which we break down in the chart below.
What is the difference between absolute co-witness and lower 1/3 Co-witness?
The decision point is in determining if you prefer Absolute Co-witness or Lower 1/3. The choice really comes down to what optic mount height you chose, the irons will stay the same height. Lower 1/3 Co-witness is just like it sounds, the iron sights (specifically the front sight) will be in the lower 1/3 of the optic.
What is cowitness on AR’s?
On AR’s, the two most common cowitness types are – “absolute cowitness” and “lower 1/3 cowitness“. Absolute vs Lower 1/3 Cowitness Explained. The graphic above shows the difference between absolute and lower 1/3 cowitness on AR’s with both optics and iron sights. The way you control your type of co-witness is with the height of your optic.
How much cowitness do you need for iron sights?
If you have flip-up iron sights – go with absolute cowitness. If you have fixed iron sights – we recommend lower 1/3 cowitness. This will give you an uncluttered view of the red dot, but you can still drop your line of sight to use the iron sights if needed.
