May, 21

AR-15 Heavy Buffer Spring: A Complete Guide to Improving Your Rifle’s Performance

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AR 15 heavy buffer spring is one of the essential components that every gun enthusiast and military personnel must know about. A buffer spring is a vital part of any firearm as it helps reduce recoil and ensures that the rifle functions smoothly. The AR-15 heavy buffer spring, in particular, plays a critical role in managing the recoil impulse generated by firing rounds.

As its name suggests, an AR-15 heavy buffer spring is designed to provide additional weight and resistance as compared to standard buffer springs. This added weight helps slow down the bolt carrier group's movement when it cycles back after each shot, ultimately reducing felt recoil. While standard buffers work well for most applications, upgrading to a heavier variant can help improve shooting accuracy while providing other benefits like smoother operation.

If you're an avid shooter or someone serving in law enforcement or military who relies on their firearm daily, understanding how your weapon works is crucial for optimal performance. In this article, we will delve deeper into what makes an AR 15 heavy buffer spring so critical for your rifle setup and explore some of its benefits over standard variants – so stick around!

AR 15 Heavy Buffer Spring: What You Need to Know


The AR-15 is one of the most popular rifles in the United States. It's a versatile firearm that can be customized to meet specific needs. One important component of an AR-15 is the buffer spring, which plays a crucial role in controlling recoil and ensuring reliable cycling.

In this article, we'll take an in-depth look at heavy buffer springs for AR-15s. We'll explain what they are, how they work, and why you might consider using one.

What Is a Heavy Buffer Spring?

A buffer spring is a compressed coil spring located inside the receiver extension (also known as the buffer tube) of an AR-15 rifle. It serves as part of the recoil system, working with other components such as the bolt carrier group and buffer weight to control recoil and ensure that each shot cycles properly.

A heavy buffer spring simply refers to a thicker or stronger coil than what's found in standard springs. The term "heavy" can also refer to increased length or resistance compared to typical offerings.

How Does it Work?

The heavier nature of these springs provides increased resistance against bolt carrier group travel during rearward movement upon firing – resulting in slower acceleration for less felt recoil when shooting your firearm.

When you install a heavy-dutybuffer kit on your rifle – like Armaspec's Stealth Recoil – it will slow down both initial chambering velocity & final slide lockback speed; thus providing more control over follow-up shots while reducing muzzle flip even under rapid-fire conditions.

Heavy-buffer kits like Shockwave Technologies' Super Heavy Duty Tungsten Carbine Buffers provide ultimate durability by using tungsten powder instead of steel; resulting not only less wear-and-tear but also superior reliability compared with conventional buffers made from inferior materials due their softness/hardness properties which affect performance either negatively or positively depending on the conditions of use.

Benefits of a Heavy Buffer Spring

There are several potential benefits to using a heavy buffer spring in your AR-15 rifle:

Reduced Felt Recoil

The primary benefit is reduced felt recoil. When you fire your rifle, energy from the cartridge propels the bolt carrier group rearward. A heavy buffer spring provides increased resistance against this movement, which slows down acceleration and reduces felt recoil.

Improved Control for Rapid Fire

A secondary benefit is improved control when firing rapidly. The slower cycle rate provided by these springs can make it easier to stay on target during rapid-fire strings – particularly at extended ranges or under high stress situations such as CQB (Close Quarters Battle) scenarios where split seconds decisions could mean life or death difference.

Increased Durability

Finally, some heavy-duty buffers are constructed with superior materials like tungsten powder – making them more durable than standard steel offerings in long-term usage scenarios; thus minimizing maintenance costs over time while maximizing performance without sacrificing reliability even after extended periods of use.

Comparison with Standard Springs

Standard AR-15 buffer springs come in different weights ranging from "carbine" length to "rifle" length versions depending on desired application – typically 3 oz for carbine & 5 oz for rifle systems respectively.

The main downside to lighter weight options is that they offer less resistance against rearward travel when compared with heavier alternatives; resulting potentially dangerous malfunctions if not properly tuned according individual needs/preferences because insufficient force allows increased chances of ejection failures, feeding issues etc…

Heavy-duty counterparts provide greater mechanical advantage by slowing down initial chambering velocity through modified design features: longer lengths (often referred as 'H' models instead shorter ones marked 'C-R' or non-designated), wider diameters/thicker gauges (with corresponding increase stiffness & strength). This results in better overall balance between cycling speed/recoil reduction due stronger spring tension so you get both benefits of speed and comfort.

Tips for Choosing the Right Heavy Buffer Spring

When selecting a heavy buffer spring, there are several factors to consider:

Rifle Configuration

The configuration of your rifle is a significant factor. Use the right length buffers corresponding with your rifle's caliber & length if possible.

Recoil Management Preferences

Different shooters have different needs when it comes to recoil management – some prefer more felt recoil while others require less. Make sure that you use springs or buffer kits that fits YOUR preference so don't end up compromising accuracy or comfort level during shooting sessions due wrong choice.


Finally, it's crucial to choose high-quality brands like Armaspec, VLTOR, JP Enterprises or Shockwave Technologies; reputable companies with proven track records for engineering reliable products using finest materials available – because reliability/durability should be top priority when considering any upgrade/maintenance options related with AR-15 platform no matter what components they may involve.


If you're looking for improved control and reduced felt recoil in your AR-15 rifle, consider upgrading to a heavy buffer spring kit. It can make all the difference in your shooting experience – providing better performance and greater enjoyment at range time than ever before!


What is an AR 15 heavy buffer spring?

An AR 15 heavy buffer spring is a component of the AR-15 rifle that helps to manage the recoil of the weapon. Recoil is caused by the combustion of gunpowder inside the rifle's chamber, which pushes out a bullet and creates a force that can be felt as a backward movement in the shooter's shoulder. The purpose of adding weight to this part of an AR-15 system is to slow down or dampen this recoil effect.

A heavy buffer spring matches with other components like heavier buffers and bolt carriers, so they work together in reducing felt recoil. Adding weight will make it harder for bullets to move backward, hence lessening muzzle rise and allowing faster follow-up shots.

There are several types of buffer springs available on today’s market for rifles such as AK47s or M4s but only specific models will work effectively with an AR 15 platform.

Why would I need an AR 15 heavy buffer spring?

Full-auto fire can quickly overheat your weapon system causing malfunctions such as failure-to-feed issues, double feeds, stovepipes etc., so semi-automatic firing mode becomes more reliable when equipped with proper parts designed for high-speed fire.

Also known as “hyperfire”, full-auto firing mode puts extra stress on all internal components including barrel harmonics which are sensitive even at low rates-of-fire because its vibration amplitude increases proportionally along with ROF (rate-of-fire).

Heavy-buffered systems have been shown through extensive research performed by companies like LMT Defense (Lewis Machine & Tool) that these springs reduce wear and tear on internal components resulting from sustained use during long shooting sessions where heat buildup may occur.

Will installing a heavier Buffer Spring affect my accuracy?

Installing any new component into your firearm could potentially cause any number problems if done improperly – including negatively impacting accuracy – however; specifically regarding adding weight to your gun’s operating system, the answer is no.

When you upgrade to an AR 15 heavy buffer spring, you are weighing down the recoil system. This helps to limit muzzle rise and allows for faster follow-up shots as previously mentioned. The benefit of a reduced felt recoil outweighs any potential loss of accuracy due to added weight.

Many professional shooters report improved accuracy with heavier buffer systems installed because reducing felt recoil allows for quicker aim recovery times after each shot fired.

How do I install an AR 15 heavy buffer spring?

Installing a new or upgraded component into your firearm can be intimidating – but don’t worry! Installing an AR 15 heavy buffer spring is relatively simple and can be done in less than 30 minutes with basic tools most people have on hand at home such as wrenches or pliers.

Firstly, ensure that your firearm is unloaded and cleared before proceeding further.
Next disassemble your rifle’s upper receiver from its lower by separating pins connecting both parts.
After safely removing bolt carrier group (BCG) from upper assembly, remove old or factory default buffer tube from back end of this area; replace it with compatible weighted one then reassemble everything back together again.

Can I mix different Buffer Springs weights?

No! Mixing different weights could cause serious problems with cycling reliability which may lead severe damage if not remedied promptly.

The reason why it's important only ever using same weight buffers springs in combination comes down the length of these coils will vary depending on their relative weight classifications. If two disparate springs are combined – say one light & one heavy – that difference in length might cause binding while cycling the action thus leading to malfunctions like failure-to-feed issues etc.,

It's essential when choosing parts for upgrading/modifying weapons systems always consult user manuals/guides written by manufacturers since they provide clear instructions regarding proper use & maintenance during extended periods usage under high-stress environments such as military training exercises where you need to depend on your equipment.

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