For urban tactical circumstances, the 300 AAC Blackout is an excellent choice. With standard-sized AR mags, it gives you the performance of a 7.62x39mm. There are dozens of ways to fine-tune your AR, but changing your buffer and spring is the most effective. The finest 300 Blackout buffer springs may be found by following our advice below.
What Is the Purpose of Replacing or Upgrading the Buffer Spring?
To put it another way, you just need enough buffer weight and spring tension to lock the bolt back on an empty magazine. You won’t get any recoil reduction if it’s too light. Your bolt may fail to lock back if it is too hefty.
The 5.56 round is optimized for standard carbine buffer systems, which are usually based on the specs of a standard military issue M4.
If you’ve decided to buy or build a rifle in 300 Blackout, it’s likely that not only is your caliber unique, but so is your rig. It will take some trial and error to get the perfect buffer and spring weight.
Market Options for Buffer Weight
Your rifle’s recoil spring must be matched with the appropriate buffer weight. To achieve the required weight, the buffer utilizes a combination of steel and tungsten weights. Standard terms are used to identify different weights. The standard three-ounce buffer used in mil-spec carbines is referred to as carbine weight. They have experience with a broad range of munitions. It’s also great for setups that aren’t too long.
The weight of a heavy or H1 carbine buffer is 3.8 ounces. It works best on ARs that have been over-gassed.
The weight of the H2 carbine buffer varies between 4.6 and 4.7 ounces. These are best suited to the recent craze of AR-15 pistols, as they are not suitable for mid-length systems.
The H3 carbine weighs between 5 and 5.4 ounces. This can be used with the 300 Blackout, but the 458 SOCOM is better suited for it.
With a standard weight of 5 ounces, rifle-length buffers are a completely different animal. They cannot be used in connection with carbine systems.
What Characterizes an ideal 300 Blackout Buffer Spring?
When choosing the right buffer and spring tension for your 300 Blackout AR-15, there are plenty of factors to consider. Don’t think it’s as simple as selecting the appropriate buffer system for your caliber.
The 300 Blackout, like many other rounds, is available in subsonic and supersonic versions, as well as a variety of bullet weights. A different spring tension will work best for each.
The length of the barrel, the size of the gas port, the muzzle device, the weight of the bolt carrier group, and other factors all play a role. Carbine springs should have between 37 and 39 coils, while rifle springs should have between 41 and 43. Even after losing length due to regular use, carbine recoil springs must be over ten inches long to be serviceable.
Rifle springs must be at least 12 inches long. Recoil springs are usually made of a solid round wire steel alloy.
Flat wire springs are expected to last longer and be more reliable.
Harmonic dampening is improved using braided wire springs.
Review: The Best 300 Blackout Buffer Springs
It might be difficult to find the finest 300 AAC Blackout recoil spring with so many choices and factors.
Fortunately, we’ve already done the legwork for you, so read on for our guide to the greatest alternatives available today.
The Best 300 Blackout Buffer Spring overall: NEMO – .300 BLACKOUT CARBINE BUFFER SPRING
- Great to have few of these for Emergencies
- Good Quality
- Not a special design
Brownells, as one of the country’s top guns merchants, has the market data and research to determine which weapons accessories and components work and which do not. Many of their goods, including components and full rifles, are made in-house.
Anything having the Brownells name on it tends to be quite cost-effective. Brownells’ reputation for giving value for money is maintained with these traditionally fashioned springs. It’s a good idea to have a few throwaway back-up springs on hand so you can show off your alpha status by being the person who rushes to your buddy’s rescue when his equipment breaks down.
The material and workmanship are guaranteed to be of the same high quality as springs from the original equipment manufacturer. If you have an older, contemporary sports rifle that isn’t working as well as it once did but still has emotional value, you have nothing to lose by putting one of these springs in it.
This choice is for you if you simply want a cheap spring, have an old contemporary sports rifle to restore, or simply want to have a spare spring or two around.
The affordability and strong workmanship are two of this spring’s best attributes.
Best 300 Blackout Buffer Spring overall kit: MOE EPT BSL LOWER BUILD KIT
- Great all around kit
- Ideal quality of all the parts included into the kit
- The slim Tolerances give you a great Fit to your rifle With No Wobble space
MOE EPT is a precision machining firm based in Tacoma, Washington, that focuses on contemporary sports rifles. This is a whole buffer kit, not just a basic spring. A mil-spec 7075-T6 aluminum buffer tube with six positions, a carbine buffer (3 oz. ), a buffer spring, an end plate, and a lock nut are included. It’s worth noting that it does also contain a stock.
This is yet another excellent way to breathe fresh life into an older contemporary sports rifle. You may rest comfortable knowing that all of the components have been deliberately developed and tested to operate effectively together. This kit has been thoroughly tested to ensure that it cycles smoothly and without sticking. It’s also a wonderful lightweight alternative, weighing in at 9.8 ounces.
It’s precision-machined to provide a secure fit for your AR. In most circumstances, the fit will be so tight that no lateral movement will be possible. Despite being produced in the United States, this is an excellent value for money solution.
This is a low-cost complete buffer system that will breathe new life into any contemporary sports rifle. The fact that this is a full kit and the precise fit to the receiver are the two best characteristics.
This is an excellent choice if you want a hassle-free, high-quality, and lightweight buffer system at a reasonable price.
3rd Best 300 Blackout Buffer Spring: PSA PA10 CARBINE BUFFER SPRING
- Standard Round Wire Spring compatible with AR-10 style carbines
- Cost effective: Relatively low price with still high quality materials
- Sturdy design
- Could Be Sensitive to How Gassed your AR Is
Palmetto State Armory is a veteran-owned firearms and gun component company based in South Carolina. PSA is also one of the country’s largest dealers of weapons and gun components.
This provides businesses with a wealth of information on which items perform, which goods satisfy customers, and which things consumers desire.
PSA takes all of this information and experience and applies it to create some of the greatest and most affordable handgun parts on the market. PSA’s PA10 buffer spring is a typical round wire buffer spring for carbine buffer systems. It’s designed to work with Palmetto State Armory’s PA-10 and PTAC Tac-10 lower AR receivers, but it may also be utilized with any carbine-sized buffer system.
It is, however, designed for use with AR-10-style systems chambered in .308 caliber. As a result, supersonic 300 Blackout ammo will operate better than subsonic 300 Blackout ammo. This spring is eleven and a half inches in length and contains 31 coils. Overall, this is a fantastic, low-cost choice for AR-10-style carbines.
Given the excellent value for money and Palmetto State Armory’s exceptional reputation for quality, this is an excellent choice.
The optimization for AR-10s and the classic design are the highlights of this spring.
4th Best 300 Blackout Buffer Spring: BROWNELLS – AR-15 BUFFER RETAINER SPRINGS
- Functions smoothly with even unclean weapons or ammunition
- Braided design makes it more resilient
- Very dependable
- Some models dont work great with subsonic 300 rounds
Brownells is a Iowa-based firm that has built a solid name in the field of contemporary sports rifles. Down on the range, the Brownells name commands respect. The BROWNELLS – AR-15 BUFFER RETAINER SPRINGS was designed to improve the performance and dependability of your contemporary sports rifle.
It’s a three-wire braided spring, similar to the one seen on the legendary German MG42 machine gun. Because each wire bends separately, this design dampens harmonics and absorbs energy. This also improves the reliability of your rifle by reducing the possibilities of spring failure and dissipating excess energy.
Over time, the braided pattern has a low tendency to lose strength and length. This spring is designed to be used with supersonic 300 Blackout ammunition. Because it is a reasonably powerful spring, it relies on supersonic rounds to transmit energy. With faulty ammunition or an unclean gun, the added spring strength adds to the dependability. One great aspect is that the twangy spring noise that comes with legacy springs is reduced.
Given Brownells’s reputation and this spring’s superb design and craftsmanship, this is a choice that will wow you and everyone else on the range with you.
Its durability and smooth, silent operation are its best attributes.
Best 300 Blackout Buffer Spring kit: AERO PRECISION – AR-15 CARBINE BUFFER KITS
- Great buffer kit with lots of high quality components
- A Braided Wire design delivers you Harmonic Dampening for Superior Accuracy
- Great price for this kit
- Found none
Aero Precision is a corporation based in Arizona. Since 1989, it has been designing, manufacturing, and marketing tactical weapon accessories. This is a newly developed braided spring based on the original German MG42 machine gun spring.
Because each braided wire compresses independently, the braided construction provides greater harmonic dampening. This essentially implies that your barrel will shake less when shooting, resulting in improved accuracy. This is a spring with a carbine length. If you have a variety of upper receivers, you’ll be glad to know that this spring is compatible with 300 Blackout, 5.56/.223, 7.62×39, 9mm, and 244 Valkyrie calibers.
This spring is made with the closest tolerances available to provide the smoothest cycling possible. Because of its tight compression, one of the great advantages of this spring is the noise reduction it provides.
Unlike other springs, this one is deafeningly quiet. It may also help with cycle issues and minimize the amount of recoil you feel. It comes with a three-ounce carbine buffer. This spring is 11 1/2 inches in length and weighs 1.7 ounces.
The newest major item in buffer system improvements is braided wire springs. The advantages are undeniable.
The harmonic dampening and noise reduction are two of this spring’s best characteristics. For the most cutting-edge AR construction, this is hard to top.
Whatever kind of 300 AAC Blackout AR-15 system you have, we have a recoil spring for you on our list.
Because there are so many factors and it is a question of taste, it may take some trial and error to discover the perfect solution. Stay careful out there, and have fun shooting!
How to find the right 300 Blackout buffer spring?
A top-notch 300 Blackout buffer is required to maintain the quality and performance of your 300 Blackout rifle.
Unfortunately, not all buffer choices are made equal, so you’ll likely need to do a lot of study to find the ideal buffer weight for your AR-15.
According to the NORC at the University of Chicago, 31% of American households had a gun in 2021. Meanwhile, the AR-15 remains a popular option among rifle owners, and it has a reputation for being a lightweight, well-built weapon.
So, how do you maintain your 300 Blackout in good working order? You’ll need to consider buffer spring kinds and lengths, as well as the quality of the buffer springs in your rifle.
Even the most diligent 300 Blackout owner may find determining buffer types and buffer spring lengths difficult, but we’re here to help you identify the proper 300 Blackout buffers and buffer springs fast and easily.
WHERE DO I GET THE BEST BUFFER FOR MY 300 Blackout
If you want a smoother working AR, the buffer is essential, but it is just one aspect of the recoil control system. When searching for the “ideal” buffer for your custom build, keep in mind that the AR-15 gas system differs from rifle to rifle, and there are many other factors to consider.
The weight of the BCG, the barrel length, the gas block, the size of the gas port on the barrel, the length of the gas tube, and the kind of ammunition you use, for example. “Which is the best buffer for my 300 Blackout?” is a question that has no definitive answer. Most AR owners will have to test out a few different buffers before finding the appropriate one for their setup.
To cycle correctly, the AR system needs the appropriate mixture of gas. Even in harsh situations, being somewhat over-gassed helps guarantee that the gun cycles properly. However, it will increase perceived recoil as well as excessive wear on internal components. Your AR will not cycle correctly if you have insufficient gas.
This might result in a failure to extract, feed, or the bolt not locking back on the final round. While there is no definitive answer to what buffer is best for your AR, we can assist you in determining what would be a better alternative when purchasing your next buffer, so you don’t have to spend money on three or four buffers before finding the appropriate one.
The gas port on a manufactured 300 Blackout is usually drilled a little larger than it should be to assure adequate gas to cycle the rifle. While being somewhat over-gassed improves dependability, it is not always necessary or desired. This is particularly true for leisure or competitive shooting, when a lighter recoil and smoother operation are required.
On the other hand, upgrading a factory 300 Blackout to a H or H2 buffer would almost certainly minimize perceived recoil, muzzle movement, and premature wear of internal components.
Before you go out and get a new buffer, consider the following money-saving tips:
If your current buffer isn’t causing any issues, like as severe recoil, you may keep it the same weight.
Is your buddy’s buffer different from yours in terms of buffer weight? Bring a friend to the range and let him test out his buffer to see whether you need a heavier or lighter one.
WHAT ARE THE MATERIALS USED TO MAKE 300 Blackout BUFFERS?
We’ve previously established that no two AR-15 buffers are the same, and that numerous different materials are utilized to make them.
The following are the most popular materials used to make 300 Blackout buffers:
Metal is the lightest alternative available, with a single aluminum buffer weight weighing on average 0.22 oz.
Steel – At 0.64 oz., steel buffers have been proved to durable and provide outstanding value for 300 Blackout owners.
Tungsten – The heaviest choice available, tungsten buffer weights often weigh approximately 1.5 oz.
Because steel and tungsten are both heavy and thick, they are still the most often utilized buffers in 300 Blackouts today. As a result, for many 300 Blackout owners throughout the nation, steel and tungsten are excellent options.
WHY DO I NEED TO REPLACE THE BUFFER SPRINGS ON MY AR-15?
Buffer springs will guarantee that your 300 Blackout performs consistently in the future. These springs are required to ensure that your 300 Blackout fires correctly, and you will be unable to shoot your AR-15 without them.
Buffer springs provide a very basic but critical function in a firearm. The bolt carrier must complete an action to put a bullet into the chamber every time the gun is cocked or a bullet is discharged. The bolt carrier impacts the buffer and buffer spring within the buffer tube when it is cocked back or pushed back. The bolt carrier is pushed forward to take up a round as a result of this motion.
A buffer spring, according to expert gunsmith Patrick Sweeney of GunDigest, works as an additional weight that allows an 300 Blackout’s carrier and bolt to return to their proper positions when a weapon is shot.
Sweeney points out that this spring is normally made of steel alloy and that it will need to be changed as the spring shortens over time.
HOW DO I MAKE SURE MY 300 BLACKOUTS’ BUFFER SPRING IS IN GOOD WORKING ORDER?
It’s usually preferable to err on the side of caution when it comes to your 300 Blackout’s buffer springs. As a result, frequent 300 Blackout maintenance is critical, as it allows you to commit the time and money required to ensure your rifle functions as intended.
Here are three methods for ensuring that the buffer springs on your AR-15 operate consistently:
- Examine the buffer and spring on your 300 Blackout.
Whether you don’t inspect your 300 Blackout’s buffer and spring, how will you know if they’re working properly? You may remove these pieces from your 300 Blackout for closer inspection anytime you want with the correct tools and knowledge.
Sweeney provides the following steps to guarantee that you can quickly and safely remove the buffer and spring from your 300 Blackout:
“To remove the buffer and spring, hinge-open the action by pushing the rear takedown pin over. A little plunger at the front of the buffer is located on the back inside of the lower. When the plunger is depressed, the buffer spring pushes the buffer out of the tube. Grab the buffer and pull it and the spring out of the tube after the head of the buffer clears the plunger. It may take a little wriggling to get it past the cocked hammer, but it will come out.”
By inspecting your rifle’s buffer and spring up close, you can ensure that they are in good working order.
- Check the Springs
Unfortunately, after a lengthy period of usage, your 300 Blackout’s springs may shorten. This implies that when the springs in your rifle shorten, you should attempt to replace them as quickly as possible.
“Replace a spring when it has grown substantially shorter than the beginning length,” Sweeney advises. “Rifle springs that are more than 12 inches long and carbine springs that are more than 10 inches long are still usable. Replace them after they’ve shrunk to those lengths or shorter.”
Even a beginner 300 Blackout owner can measure the springs quickly and easily.
The rifle and carbine springs on your 300 Blackout have the same diameter. According to Sweeney, rifle springs typically contain 41 to 43 coils, whereas carbine springs have 37 to 39 coils on average. If any of the measures are shorter than anticipated, it may be time to replace the springs in your rifle or carbine.
- Examine the Coils
It’s important to note that rifle and carbine springs are not interchangeable. As a result, you’ll want to keep track of each springs individually.
You should also avoid taking shortcuts while studying the coils, as this might cause major difficulties with the performance of your 300 Blackout.
“While the lengths and quantity of coils are close enough to get by in an emergency,” Sweeney warns, “resist the temptation.” “‘Emergencies’ tend to go on longer than they should since the equipment is ‘obviously’ working great. It’s difficult to get by with the improper spring on a rifle or carbine.”
Investing in the correct rifle buffer, on the other hand, may make a huge impact for 300 Blackout owners.
According to Sweeney, if a carbine operates well with a standard buffer, you may be better off leaving it alone for the time being. If, on the other hand, you’re having trouble shooting your rifle, you should replace all of your carbines with H or H2 buffers right away.
Under no circumstances should you contemplate swapping buffers between your rifle and carbine.
“The rifle buffer is overly long, and shooting a carbine with one may cause the buffer tail to contact the end of the tube at greater speeds than intended. If you’re fortunate, the carrier key screws will shear off as a consequence. The lower receiver will shatter at the buffer tube threads if the screws do not break off in time “Sweeney makes a point. “Install the right buffer and save yourself the trouble of having to buy a new lower to fix the error.”