New member
Nov 7, 2018
Maintaining the quality and performance of your AR-15 rifle requires a top-notch AR-15 buffer. Unfortunately, not all buffer spring options are created equal, which means you may need to conduct plenty of research to ensure you're able to discover the best buffer weight for your AR-15.
NORC at the University of Chicago reported 31 percent of U.S. households owned a gun in 2014. Meanwhile, the AR-15 remains a popular choice for rifle owners, and this gun boasts a proven reputation as a lightweight, well-constructed model.
So what does it take to keep your AR-15 in top condition? You'll need to evaluate buffer spring types and buffer spring lengths and ensure your rifle's buffer springs are of the highest quality.

Examining buffer spring types and buffer spring lengths often challenges even the most studious AR-15 owner, but we're here to help you find the right AR-15 buffers and buffer springs quickly and effortlessly.

Why Should I Choose an AR-15?

The U.S. Department of Justice's Bureau of Alcohol, Tobacco, Firearms and Explosives reported more than 3.1 million rifles were manufactured in 2012, up from roughly 2.3 million rifles manufactured a year earlier. This shows the demand for rifles has increased recently, which may have sparked added interest in AR-15s as well.

The National Shooting Sports Foundation notes AR-15 platform rifles “are among the most popular firearms being sold … [and] are today's modern sporting rifle.” These rifles appear similar to many military rifles, but are semi-automatic, which means they only fire one round per pull of the trigger. They also operate as all-weather firearms, making them valuable options for law enforcement officials, shooting sports competitors and everyday gun owners.
Rifle owners typically demand the best available rifles and, as such, AR-15s serve as dependable options for those who prioritize quality. AR-15s serve as viable options for rifle owners for many reasons, including:

1. Supreme Accuracy - An AR-15 delivers unsurpassed accuracy, particularly when it is compared to the accuracy of a shotgun or pistol.
2. Easy to Use - The time and costs associated with learning to use a handgun sometimes can be prohibitive for everyday citizens.But with an AR-15, a gun owner can enjoy an easy-to-use rifle.
3. Exceptional Safety - As an exceedingly accurate weapon, an AR-15 can serve the needs of law enforcement officers and others who require a safe and accurate gun.

An AR-15 serves as a top choice among rifle owners - something that is unlikely to change any time soon. And for those who plan to buy an AR-15 or already own one, it is essential to understand the ins and outs of AR-15 rifle maintenance.

Why Do I Need to Replace My AR-15 Buffer Springs?

With buffer springs, you can ensure that your AR-15 will continue to perform consistently. These springs are necessary to guarantee your AR-15 fires properly, and without them, will not allow you to fire your AR-15.

“Buffer springs provide a very simple yet important purpose in a rifle. Each time the gun is cocked or a round is fired, the bolt carrier has to follow through an action to load a round into the chamber. When the bolt carrier is either cocked back or pushed back, it hits the buffer and buffer spring inside the buffer tube. This action pushes the bolt carrier forward to pick up a round.” So wrote “The AR Guys” in a blog post.

Furthermore, master gunsmith Patrick Sweeney tells GunDigest that a buffer spring acts as an extra weight that enables an AR-15's carrier and bolt to move back into the correct position after a rifle is fired. This spring usually consists of steel alloy, Sweeney points out, and will need to be replaced as a spring shortens over an extended period of time.

How Do I Choose the Right Buffer Spring for My AR-15?

Most buffer springs may look the same at first glance, but you’re sure to find many different types available that meet your needs.
Some of the most common buffer springs on the market include:
  • Carbine buffer - This consists of three steel weights and usually totals about 3.0 oz. in weight.
  • Heavy (H) buffer - An H buffer boasts a combination of one tungsten and two steel weights and commonly weighs around 3.8 oz.
  • H2 buffer - This buffer features the same design as the H buffer but weighs around 4.7 oz. on average.
  • H3 buffer - Similar to the H buffer and H2 buffer, the H3 buffer includes three tungsten weights and often weighs about 5.6 oz.
  • Rifle buffer - A rifle buffer includes five steel weights and a steel spacer and totals around 5.0 oz.

Finding the right buffer weight guarantees you'll be able to reduce your AR-15's recoil and, ultimately, enjoy a better experience every time you use it.
However, it’s important to note that you must maintain your AR-15's buffer to ensure the bolt carrier is able to reload your rifle properly.

Which Materials Are Used to Create AR-15 Buffers?

We've already established that no two AR-15 buffers are identical and, as such, many materials are used to construct buffers, as well.
The most common materials that are used to create AR-15 buffers include:
  • Aluminum - The lightest option available, aluminum buffers frequently weigh less than 0.10 lb. per cubic inch (PCI) on average.
  • Steel - Weighing in around 0.28 lb. PCI, steel buffers are proven to last and deliver exceptional value for AR-15 owners.
  • Lead - A lead buffer usually weighs about 0.41 lb. PCI on average and represents a versatile option.
  • Tungsten - A tungsten buffer commonly weighs around 0.70 lb. PCI on average and the heaviest option available.
The AR Guys point out that steel and tungsten remain the most frequently used buffers in AR-15s today, as these materials are both heavy and dense. Thus, steel and tungsten represent great choices for many AR-15 owners across the country.



New member
Nov 7, 2018
How Do I Ensure That My AR-15's Buffer Spring Is Working Properly?

With your AR-15's buffer springs, it’s always is better to err on the side of caution. Therefore, regular AR-15 maintenance is essential, as this will allow you to devote the necessary time and resources to guarantee your rifle performs as needed.

Here are three tips you can use to guarantee your AR-15's buffer springs perform consistently:

1. Evaluate Your AR-15's Buffer and Spring

How will you know if your AR-15's buffer and spring are performing well if you do not examine them? With the right tools and know-how, you can remove these items from your AR-15 for closer examination whenever you'd like.

Sweeney offers the following instructions to ensure you can remove your AR-15's buffer and spring quickly and safely:
“To remove the buffer and spring, push the rear takedown pin across and hinge-open the action. At the rear inside of the lower is a small plunger at the face of the buffer. Depress the plunger and the buffer spring will push the buffer out of the tube. Once the head of the buffer clears the plunger, grab the buffer and pull it and the spring out of the tube. It may take some wiggling to get it past the hammer (which should be cocked), but it does come out.”
Getting an up-close look at your rifle's buffer and spring enables you to guarantee the quality of these components.

2. Measure the Springs

Unfortunately, your AR-15's springs will shorten after prolonged use. This means that, as your rifle's springs shorten, you should work to replace these springs sooner rather than later.

“When a spring has gotten much shorter than the starting length, replace it,” Sweeney recommends. “As long as a rifle spring is more than 12 inches long, and a carbine spring more than 10 inches long, they are still serviceable. When they have shortened to those lengths or shorter, replace them.”
Measuring the springs can be fast and simple for even a novice AR-15 owner.

The springs for your AR-15's rifle and carbine feature the same diameter. Sweeney notes the rifle springs usually have between 41 and 43 coils, while the carbine springs boast 37 to 39 coils on average. And if any of the measurements seem shorter than expected, it may be a good time to replace your rifle or carbine springs.

3. Study the Coils

Remember, rifle and carbine springs are NOT interchangeable. Thus, you'll want to count these springs separately.

You also will want to resist the temptation to take shortcuts as you study the coils, as this could result in serious problems with your AR-15’s performance.
“While the lengths and number of coils would seem close enough that, in an emergency, you could get by, resist the temptation,” Sweeney points out. “‘Emergencies’ tend to linger on, as the equipment is ‘obviously’ doing fine. It is hard on the rifle or carbine to be ‘getting by’ with the wrong spring.”
Of course, investing in the right rifle buffer can make a world of difference for AR-15 owners, too.

Sweeney states that if a carbine works correctly with a conventional buffer, you may be best served to leave the buffer alone for the time being. On the other hand, if you experience problems firing your rifle, you should consider replacing all of your rifle’s carbines with H or H2 buffers immediately.
And under no circumstances should you ever consider exchanging rifle and carbine buffers.

"The rifle buffer is too long, and firing a carbine with a rifle buffer in it will cause the buffer tail to strike the end of the tube at higher than designed velocities. If you are lucky, the result will be that the carrier key screws shear off. If the screws do not shear off in time, the lower receiver will crack at the buffer tube threads," Sweeney notes. "Install the proper buffer, and avoid the hassles of a new lower to correct the mistake."