July, 23

20-Inch AR-15: The Ultimate Guide to Barrel Length and Accuracy

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20 in AR 15 – these four words have become synonymous with precision, accuracy and unparalleled performance. But what do they actually mean? For those unfamiliar with the world of firearms, the term "20 in AR 15" might sound foreign or confusing.

However, for gun enthusiasts and professionals alike, this phrase represents a specific type of barrel length that has revolutionized the shooting industry. From competition shooting to hunting to military applications, the 20 inch barrel has proven to be a game-changer for those seeking superior accuracy at greater distances.

In this article, we will delve into the world of AR-15 rifles and explore why so many people choose this particular size when customizing their firearm. We will examine its benefits as well as any potential drawbacks it may have compared to other barrel lengths available on today's market. So if you're interested in learning more about what makes "20 in AR 15" such a sought-after feature among gun enthusiasts everywhere – keep reading!

20 in AR 15: A Comprehensive Guide

The AR-15 is one of the most popular rifles used by military personnel, law enforcement agencies, and civilians around the world. It is a versatile weapon that can be customized to suit individual needs. One of the most popular customizations for this rifle is adding a 20-inch barrel. In this article, we will explore everything you need to know about using a 20 in AR-15.

Benefits of Using a 20 in AR-15

Adding a longer barrel to your rifle has several advantages over using shorter ones. Here are some benefits of using a 20 in AR-15:

Increased Accuracy

A longer barrel means more surface area for rifling. This increased rifling twists can cause the bullet's spin rate to increase and create gyroscopic stabilization for greater accuracy at extended distances.

Additional Velocity

A lengthened barrel allows expanding gases from burning powders even more time inside that tube – creating extra energy transfer between propellant and projectile along with higher muzzle velocity.

Better Long Range Performance

With its additional accuracy and velocity properties paired with an increased range due mostly from its size – up from around three hundred meters on average versus five hundred twenty-five meters or more depending on ammo type – makes it great for long-range shooting situations.

Comparing Different Barrel Lengths

The standard length for an AR-15's carbine-style gas system ranges between twelve and sixteen inches long. However, there are many options available when considering various lengths beyond these sizes (such as twenty inches).

Here’s how different barrels stack up:

Barrel Length Advantages Disadvantages
12” –14" Great mobility Short distance effectiveness
16”–18" Perfect balance between mobility & effective range Muzzle flash & blast
18”–24" Ideal for longer ranges Weight and decreased mobility
24” & Longer Best long-range performance Heavy and cumbersome

Tips for Using a 20 in AR-15

Using a rifle with an extended barrel is not always easy, especially if you are used to using shorter ones. Here are some tips to help you use your 20 in AR-15 effectively:

Practice Makes Perfect

Practicing with your rifle before hitting the range could save yourself from difficult situations. Letting the firearm become an extension of yourself by exercising proper handling, assembling/disassembling techniques, cleaning practices can create muscle memory that will benefit you downrange.

Use High-Quality Ammo

When firing rounds through any firearm – especially one with such precision as a twenty-inch barrel – quality ammunition is key. Firing hand loads or even cheaper surplus ammo may reduce your accuracy or cause malfunctions which could jeopardize the shooting experience.


In conclusion, upgrading your AR-15's barrel length to twenty inches has several benefits that enhance its accuracy and performance at longer distances while still retaining decent mobility characteristics compared to other lengths exceeding it's size. It’s essential to keep in mind how each firearms' specific features play off various aspects like weight limitation preference or shooting style preferences when making any modifications but keeping all these factors into account; this option should be considered by anyone looking for an upgrade on their standard carbine-style gas system builds.


What is a 20 in AR-15 and what are its advantages?

A 20-inch AR-15 refers to the barrel length of an AR-15 rifle, which is one of the most popular rifles used by military personnel, law enforcement agencies, and civilians for hunting or personal protection. The standard length of an AR-15 barrel is typically around 16 inches. However, many people prefer a longer 20-inch barrel as it offers several advantages over shorter ones.

One advantage of a longer barrel like that found on the 20 in AR-15 is increased accuracy at longer distances because it provides more stability and less recoil. This makes shooting easier even for those who are not experienced shooters. Additionally, having more space inside the bore allows for fewer gases to escape during firing resulting in better energy transfer to bullets.

Another benefit that comes with using a long-barrelled rifle such as this one has to do with bullet velocity which increases as you have more time while propelling through your rifling grooves; this translates into greater energy delivered upon impact at farther distances than shorter barrels can achieve.

Is it legal to own or use a 20 in AR-15?

Yes! In most states within America owning or using an Ar – fifteen including those outfitted with twenty inch barrels falls entirely under state laws governing firearm ownership and use within these jurisdictions.

However there may be some specific rules regarding where you can carry them (e.g., private property only), so always check local ordinances before carrying any firearms outside your home range area!

Despite being legal though does not necessarily mean one should go ahead without proper training first; remember safety must always come first when handling firearms especially high powered ones like these!

Are there any downsides associated with using a long-barrelled rifle such as the 20 in Ar – fifteens?

One major downside associated with using long barreled guns stems from their overall weight and length, which can make them difficult to maneuver in tight spaces or when on the move. The added weight of the barrel also makes it more challenging to hold steady for extended periods.

Additionally, 20-inch barrels may require a longer rifle stock that may not be comfortable for all users. Others have noted that these long rifles may become quite unwieldy in close quarters combat situations due to their size, impeding fluid movement during critical moments.

What type of ammunition is compatible with a 20 in AR-15?

The most common type of ammunition used with an AR-15 rifle is .223 Remington/5.56mm NATO cartridges. The advantage of this cartridge is that they offer excellent accuracy, high velocity and low recoil making them well suited for both hunting and tactical shooting scenarios.

However, there are other calibers such as .300 Blackout which many prefer because it has larger bullets leading to increased accuracy at greater distances than standard rounds do while still maintaining good energy transfer upon impact!

It's essential always check your firearm specs before selecting any ammunition though: using incompatible ammo can result in malfunctions affecting performance possibly even discharging unexpectedly causing harm or damage around you if not handled properly

Do I really need a 20 inch barrel on my Ar – fifteen?

This depends on what your intended use will be! Those who plan on using their rifles primarily for long-range target shooting would benefit immensely from investing in longer barrels like those found among twenty-inch variants: As stated earlier this provides better accuracy over greater distances while maintaining bullet velocity throughout trajectory path leading up until impact point allowing maximum damage output .

On the other hand shorter-lengthed barreled ARs are generally preferred by hunters as they offer improved mobility within dense woodland regions where being quiet and quick about getting into position without disturbing prey becomes essential; essentially ease-of-use trumps raw power here!

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