Ethan Clarke
AR-15 handguards are typically made from either polymer or aluminum. Polymer handguards are usually drop-in handguards, which are easy to install and lightweight. They are also highly durable and have good impact resistance, but they have a lower melting point than aluminum. Aluminum handguards are stronger and more resistant to heat, but they emit more heat during extended shooting sessions. While fiberglass-reinforced polymer handguards offer higher impact resistance than aluminum, they may still warp or melt under continuous lock-and-load shooting conditions. Therefore, AR-15 handguards are not typically made of fiberglass-reinforced polymer, but rather of standard polymer or aluminum.
| Characteristics | Values |
|---|---|
| Main function | Protect the shooter's hand from the heat generated by the barrel |
| Other functions | Hold and support the firearm with the non-trigger hand; add accessories such as angled back-up iron sights, lights, lasers, or forward grips |
| Materials | Polymer, aluminum, fiberglass-reinforced polymer, plastic, wood |
| Pros of polymer | Lightweight, highly durable, good impact resistance, protects hands from heat |
| Cons of polymer | Lower melting point than aluminum, can warp or melt under continuous lock-and-load shooting |
| Pros of aluminum | Higher melting point than fiberglass-reinforced polymer, stronger than polymer |
| Cons of aluminum | Emits more heat during extended shooting sessions than polymer |
| Types | Drop-in, free-floating, railed, retro |
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What You'll Learn
- AR-15 handguards are made from either polymer or aluminium
- Pros of polymer handguards: lightweight, durable, and better impact resistance
- Cons of polymer handguards: lower melting point than aluminium
- Pros of aluminium handguards: stronger, higher melting point than polymer
- Cons of aluminium handguards: emits more heat than polymer
AR-15 handguards are made from either polymer or aluminium
AR-15 handguards are typically made from either polymer or aluminium. Both materials are durable and provide protection from heat, but they each have distinct advantages and disadvantages.
Polymer handguards are constructed from a lightweight and durable material, making them ideal for drop-in handguards. Polymer handguards are often reinforced with fiberglass, which offers higher impact resistance than aluminium. This makes them excellent at protecting your hands from the heat generated by repetitive shooting. However, polymer has a lower melting point than aluminium, so continuous lock-and-load shooting could potentially warp or melt the handguard. To mitigate this, some manufacturers add an aluminium or stainless steel heat shield to the underside of their polymer handguards, providing an extra layer of protection.
Aluminium handguards, on the other hand, have a much higher melting point than polymer. They can withstand high-volume shooting without the risk of warping or melting. While aluminium is generally durable, it may not have the same impact resistance as fiberglass-reinforced polymer. Aluminium handguards are commonly used for free-float handguards, which offer better accuracy by allowing the barrel to "float" freely, resulting in uninterrupted barrel harmonics.
The choice between polymer and aluminium handguards depends on your specific needs and shooting style. Polymer handguards are perfect for casual or hunting purposes, while aluminium handguards are better suited for high-volume or rapid-fire shooting. Additionally, the accuracy of free-float handguards makes aluminium a preferred choice for long-range shooting.
It is worth noting that AR-15 handguards are also available in other materials, such as carbon fiber, and different styles like the retro drop-in handguards, offering a range of options to suit various preferences and requirements.
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Pros of polymer handguards: lightweight, durable, and better impact resistance
Polymer handguards for AR-15s are typically constructed in two pieces that fit around the barrel and are fastened together by a handguard cap and a delta ring assembly. They are usually lightweight, highly durable, and offer better impact resistance than other handguard materials.
Polymer handguards are perfect for those who use their rifles for hunting or casual weekend shooting. This is because, although polymer has a lower melting point than aluminium, it would take a lot of shooting for the handguard to reach this temperature. Therefore, it is unlikely that the handguard would warp or melt under these conditions. However, if you engage in high-volume shooting, you may want to opt for aluminium handguards, as they have a higher melting point.
Polymer handguards are also beneficial as they are easy to install, and most are offered in different lengths to accommodate varying gas system lengths. They tend to resist heat well, even after lots of shooting, and often have a metal or aluminium heat shield on the inside to protect your hands from excessive heat.
Finally, polymer handguards can add mounting options and enhance the look of your rifle. They are also available in several varieties, including drop-in and free-float handguards, which can offer great customisation options.
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Cons of polymer handguards: lower melting point than aluminium
The primary purpose of a handguard is to protect the shooter's hand from the heat of the barrel. Polymer handguards are usually reinforced with a heat shield made of steel or aluminium to separate the polymer from the barrel and dissipate the heat. However, polymer has a lower melting point than aluminium.
Although rare, under continuous and extreme firing, the heat from the barrel could warp or even melt a polymer handguard. If you use your rifle for hunting or casual weekend shooting, it is unlikely that you will do enough shooting for your polymer handguard to reach the melting point. However, if you plan to engage in high-volume shooting, you may want to consider an aluminium handguard or adding tactical gloves to your range gear.
Polymer handguards are generally the cheapest option and are lightweight and highly durable. They are also available in several lengths to accommodate different gas system lengths. Polymer also has higher impact resistance than aluminium.
Aluminium handguards are more expensive, but they do offer a significant advantage over polymer handguards in that they do not contact the forward portion of the barrel, which can improve the rifle's accuracy. A typical aluminium handguard can reach 220 degrees Fahrenheit after 300 rapid-fire rounds, but this heat will not distort your equipment.
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Pros of aluminium handguards: stronger, higher melting point than polymer
Aluminium and polymer are the two most common materials used for AR-15 handguards. Polymer handguards are usually made of two pieces that fit around the barrel and are fastened together by a handguard cap and a delta ring assembly. They are also very easy to install.
Aluminium handguards, on the other hand, are stronger than polymer handguards. They are also more resistant to heat, with a much higher melting point. While polymer handguards can warp or melt under continuous and extreme firing, aluminium handguards will not, even when the barrel reaches extremely high temperatures.
Polymer handguards are often reinforced with fiberglass, which increases their impact resistance. However, aluminium handguards are still durable, and some are made from lightweight aluminium alloy, so they won't add extra weight to your rifle.
If you plan on doing a lot of high-volume shooting, aluminium handguards are a better option. They can withstand the heat generated by rapid-fire rounds and will not be damaged by the high temperatures. While polymer handguards are also durable and provide good heat protection, they are more susceptible to warping or melting under extreme conditions.
Overall, both materials are popular choices for AR-15 handguards and offer their own advantages. Aluminium handguards are stronger and more heat-resistant, making them ideal for high-volume shooting, while polymer handguards are lightweight, durable, and provide good impact resistance.
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Cons of aluminium handguards: emits more heat than polymer
Aluminium handguards emit more heat than polymer handguards, which is an important consideration when choosing a handguard for your AR build. While both materials are durable and will protect your hands from excessive heat, polymer is more lightweight and has higher impact resistance. Polymer handguards are often used for drop-in handguards due to their lightweight construction.
Polymer handguards, especially those made from fiberglass-reinforced polymer, offer superior impact resistance compared to aluminium handguards. They also excel at protecting your hands from the heat generated during repetitive shooting. However, polymer has a lower melting point than aluminium, which can be a concern for high-volume shooters.
Aluminium handguards, on the other hand, have a significantly higher melting point. While this ensures that your equipment won't be distorted by heat, the handguard itself will become hot to the touch. After 300 rapid-fire rounds, an aluminium handguard can reach temperatures of 220 degrees Fahrenheit. This can be uncomfortable and may require the use of tactical gloves for shooters who engage in high-volume shooting.
Some manufacturers address this issue by incorporating aluminium heat shields into their polymer handguards. This design enhances heat resistance by creating a greater distance between the polymer and the barrel, reducing the chances of warping or melting. Aluminium handguards are commonly used for "railed" handguards, with the quad rail being the most prevalent type.
In summary, while aluminium handguards have a higher melting point, they emit more heat than polymer handguards. Polymer handguards, particularly those made from fiberglass-reinforced polymer, offer superior heat protection for your hands and higher impact resistance. However, for high-volume shooters, the lower melting point of polymer may be a concern, and the addition of aluminium heat shields can mitigate this issue. Ultimately, the choice between aluminium and polymer handguards depends on specific use cases and personal preferences.
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Frequently asked questions
AR-15 handguards are typically made from either polymer or aluminum. The classic M4 or AR-15 handguard is a 2-piece polymer handguard with a metal heat shield on the inside.
Polymer handguards are lightweight, highly durable, and have higher impact resistance than aluminum handguards. They are also cheaper and easier to install. However, they have a lower melting point than aluminum, so they may warp or melt under continuous lock-and-load shooting conditions. Aluminum handguards, on the other hand, are stronger, have a higher melting point, and are more resistant to heat. They are typically used for high-volume shooting.
Plastic AR-15 handguards can be made from fiberglass-reinforced polymer, which has higher impact resistance than aluminum. However, it is important to note that not all plastic handguards are made from fiberglass. Some handguards are made from pure polymer, while others may be lined with aluminum alloy to increase durability and heat resistance.
