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Two Different Options for Iron Sights for Better Accuracy

Having optics installed in your firearm can give you various benefits like low-light visibility, extended range and having ease of target acquisition. Even the military today now switched to optics to use for combat situations.

It is however essential that you remember that such high tech replacements for dependable old iron sights could be disabled in a certain way. Without proper backup, damaged optics could render the weapon useless for accurate shooting.

The BUIS or Back Up Iron Sight can in fact give you critical redundancy in the process of setting up your AR. This may add some weight, but this can give you the ability to get targets even when the primary sight goes down. What you will learn furthermore in this article are some things to consider in your selection of a backup iron sight.
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Iron sights are available in various configurations based with the height of the sights. The basic concept to this is that you need the front and also the rear sight to have the same height when you wish to hit the target.
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Where this comes into important is to where you mount the front sight. Most backup iron sights are available in 2 options which are the gas block height and same-plane height.

On the gas block BUIS configuration, the front sight post is about 1/4 ” higher than the rear sight aperture so that it could make up for the reason that the front sight is mounted 1/4 ” lower compared to the upper receiver to where the rear sight is being mounted. It is very important to remember that the gas block sights are just for mounting on gas blocks that are lower than its upper receiver. Some of the gas blocks have the same height with that of the receiver to where you want the same-plane sight is.

The same-plane sights are made for the front sight post will be on the same height as the rear aperture if the sights are going to be placed on a flat surface. This means that for these sights, the front sight should be mounted somewhere at the same height as its upper receiver. In most cases, people will mount the front sight on a free float handguard with a rail present on top.

Your overall AR-15 setup will be the one to help you determine if you need the folding or fixed BUIS. The fixed iron sights have the advantage to where it comes with no moving parts, which gives the advantage to where it makes it nearly indestructible. It is also always ready where there’s no need for you to mess with it.

If you are ever not using them as your main targeting system, you should consider using the fixed sights, but for backup purposes, the folding types are the ones that’s best.

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