June, 15

AR 15 Buffer Tube and Stock: A Comprehensive Guide for Gun Enthusiasts

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The AR 15 buffer tube and stock are two critical components of the popular AR 15 rifle. These parts play an essential role in ensuring that the firearm operates smoothly and accurately. The buffer tube is responsible for reducing recoil, while the stock provides a stable platform for holding your AR-15.

Many gun enthusiasts consider these parts as crucial factors that determine the performance of their rifles. That's why it's important to choose high-quality buffer tubes and stocks that match your specific needs.

In this article, we'll explore everything you need to know about AR 15 buffer tubes and stocks – from what they are, how they work, different types available in the market to tips on selecting the best ones for your particular needs. So read on to find out more!

AR 15 Buffer Tube and Stock: The Ultimate Guide


The AR-15 is a highly customizable firearm, and the buffer tube and stock are two of the most important parts that can be modified. Together, they control how much recoil you feel after each shot.

In this guide, we will go over everything you need to know about buffer tubes and stocks for your AR-15. We will cover what they are, the different types available in the market today, their benefits, as well as tips on installation.

What is an AR 15 Buffer Tube?

The buffer tube (also called receiver extension) is a component that connects to the lower receiver of an AR-15. It houses a spring-loaded mechanism known as the recoil spring assembly which absorbs recoil energy every time you fire your gun.

Buffer tubes have three main parts – tube body (made from aluminum or polymer), castle nut (secures it in place), and end plate (which holds both together).

There are two types of buffer tubes – Commercial-spec diameter (.625 inches) which fits commercial stocks only; Mil-Spec diameter (.750 inches) which fits both commercial and military-style stocks.

Types of Stocks

Stocks attach to your rifle's buffer tube by sliding onto it or securing with screws. There are three main types:

Fixed Stocks

Fixed stock systems offer better accuracy because there’s no wiggle between stock assemblies like those found on adjustable models. They tend to be bulkier but provide an excellent cheek weld for precise shooting positions.

Collapsible/Adjustable Stocks

Collapsible/adjustable models allow shooters to adjust length-of-pull easily without any tools needed! This makes them perfect if multiple people use one rifle since everyone can get comfortable quickly!

Pistol Braces

Pistol braces provide more support than traditional pistol grips while also being lighter weight than standard buttstocks. These products enable pistol builds to be more stable and accurate compared to using just a pistol grip alone.

Benefits of Upgrading Your Buffer Tube and Stock

Improved Comfort

Upgraded buffer tubes and stocks can greatly reduce recoil, making it easier for you to stay on target. Additionally, adjustable stocks allow you to customize the length of your gun’s pull which ensures a comfortable shooting experience.

Better Accuracy

Enhanced control over your rifle translates into better accuracy when firing.


Swapping out parts like these is easy with minimal tools needed! There’s also an endless variety of stock options available so pick one suited for your needs!

Tips on Installation

Installing a buffer tube and stock system is relatively straightforward. Here are some tips:

  1. Take your time installing the components.
  2. Ensure that all parts fit together snugly before tightening any screws or bolts.
    3.De-grease threaded areas before applying any Loctite if desired (to make sure everything stays put).
    4.Test fire once assembled; ensure proper function before taking it out on the range!


Investing in upgrading your AR-15's buffer tube and stock will improve comfort, accuracy, customization options while providing flexibility during use! Whether using fixed or adjustable models (or even pistol braces), there are many benefits associated with such upgrades – all resulting from improved management over recoil energy by way of these crucial firearm components!


What is an AR 15 buffer tube and stock?

The buffer tube and stock are crucial components of the AR 15 rifle. The buffer tube, also known as the receiver extension, is a hollow metal tube that connects the upper receiver to the lower receiver. It houses a recoil mechanism that controls how much force is absorbed when firing a round.

The stock is attached to the buffer tube at one end and provides support for shooting accuracy. The type of stock can vary depending on personal preference or intended use. Some popular choices include fixed stocks, collapsible stocks, and adjustable stocks.

Together, these two components make up what's commonly referred to as "the buttstock assembly." They play an important role in controlling recoil while providing comfort during extended periods of use.

What are some benefits of upgrading my AR 15's buffer tube and stock?

Upgrading your rifle's buffer tube and stock can improve its performance in several ways. Firstly, upgrading to a higher-quality material can increase durability over time with continuous use or wear-and-tear from rough handling or exposure elements like weather conditions.

Secondly, upgrades may offer more customization options for shooters looking for personalized experiences with their rifles by allowing them greater flexibility in choosing different lengths or styles based on preferences/needs such as length-of-pull (LOP) adjustments which can make it easier/more comfortable when sighting-in sights/scopes/optics mounted onto rails atop receivers/barrels without having any adverse effect upon aim-point consistency since it alters nothing related mechanically but only ergonomically; adjustability thus being key here since LOP affects both sight alignment AND trigger pull mechanics!

Thirdly: Upgrading your buttstock assembly could potentially reduce felt recoil by providing better shock absorption – this makes it easier to handle your weapon during rapid fire sessions without sacrificing accuracy!

Lastly: The right upgrade could help you achieve greater stability during aiming/shooting due either through addition attachment points allowing for more secure mounting of sling-bags/other peripherals or through designs that offer improved grip and control.

Is it legal to own an AR 15 buffer tube and stock?

Buffer tubes and stocks are generally legal in the United States, as long as they comply with federal regulations. However, specific laws vary from state to state, so it's important to check local legislation before purchasing or owning these components.

It's also worth noting that certain modifications may be illegal under federal law. For example, installing a bump stock on an AR 15 is prohibited by the National Firearms Act (NFA) of 1934 since this attachment allows semi-automatic rifles like the popular AR-15 model to fire at rates similar full-auto weapons which seems quite hazardous proving itself detrimental both safety-wise as well legality-wise!

What materials should I look for in an AR 15 buffer tube and stock?

The most common materials used for buffer tubes include aluminum & polymer whereas stocks have a wider range of materials such as wood/wood composites/fiberglass/polymer/metal.

Aluminum is lightweight yet strong enough to withstand repeated use over time without becoming easily damaged; furthermore its density allows manufacturers easier machining during production processes leading them often using alloys like aircraft-grade aluminum which offers extreme strength-to-weight ratio making it ideal material choice despite higher costs associated with precision manufacturing processes required!

Polymer is another commonly used material due mostly because its low cost thus making it accessible users operating tight budgets! Polymers also provide good durability given their resistance against corrosion/rust while remaining flexible enough not only absorb shock/recoil but also prevent chaffing bruises from prolonged shooting sessions thanks excellent ergonomics!

Wooden/bamboo/composite/hybrid-stocks are better suited hunting/target-shooting experiences where aesthetics play key role just rifle functionality alone won't satisfy one's needs fully; moreover different people have varying preferences when comes looks feel firearms hence these are ideal those trying blend comfort with style preferences!

How do I install an AR 15 buffer tube and stock?

Installing a new buffer tube and stock on your AR 15 rifle can be done with some basic tools, patience, and proper instruction.

The first step is to ensure that the firearm is unloaded. Then remove the existing buffer tube by unscrewing its castle nut using an armorer's wrench or similar device while taking caution when dealing with spring-tension componentry.

Next, attach the new buffer tube to your lower receiver by screwing in its castle nut clockwise until it feels secure but don't overtighten! Make sure you align holes in both parts before securing pins/roll-pins that prevent them from twisting out place due recoil vibrations!

Finally, slide on your chosen buttstock onto end of installed buffer-tube; if adjustable loosen locking mechanism either via screws / levers then pull towards/away from receiver until you reach desired length-of-pull before retightening locknuts/screws etc..

It's important to follow manufacturer instructions closely as improper installation could lead to malfunction or even injury during use!

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