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15 Inch Handguard for AR-15 | M-LOK, Carbon Fiber & Lightweight Rails – Mounts Plus
15 Inch Handguard – Free-Float M-LOK Rails for AR-15 Rifles
Looking to upgrade your AR-15 with a long, modular, and rugged handguard? Our 15 inch handguard options deliver unmatched precision, durability, and versatility—perfect for competitive shooters, tactical operators, or rifle builders who demand more rail space and accessory flexibility.
At Mounts Plus, we carry only the most trusted brands in the industry, including Timber Creek, PRI, ERGO, UTG PRO, and Aero Precision—all offering top-tier 15” handguards built for performance.
🔍 Why Choose a 15 Inch Handguard?
A 15” AR-15 handguard is ideal for full-length rifles and long-barrel builds. It covers most of a 16” barrel, providing:
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✅ Maximum surface area for mounting accessories (lights, grips, bipods)
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✅ Enhanced grip control for competition or tactical use
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✅ Improved accuracy from free-float barrel design
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✅ Optimized heat dissipation from longer ventilation channels
⚙️ Key Features
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Fits 16” barrels with rifle- or mid-length gas systems
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M-LOK, KeyMod, and Picatinny rail systems supported
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Free-float design for improved accuracy and stability
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Lightweight construction using aircraft-grade aluminum or carbon fiber
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Hard anodized finish for durability and corrosion resistance
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Easy installation with provided tools and instructions
🧱 Best 15 Inch Handguards (Compared)
| Product Name | Mount Type | Rail System | Material | Price |
|---|---|---|---|---|
| Timber Creek 15" Enforcer M-LOK Handguard | Free-Float | M-LOK | Aluminum | $199.95 |
| PRI Gen III Carbon Fiber 15" Handguard | Free-Float | Picatinny | Carbon Fiber | $368.00 |
| Aero Precision ATLAS S-ONE 15" M-LOK Handguard | Free-Float | M-LOK | Aluminum | $204.99 |
| ERGO SuperLite 15" M-LOK AR-15 Handguard | Free-Float | M-LOK | Aluminum | $109.95 |
| UTG PRO Super Slim M-LOK Free-Float 15” Handguard | Free-Float | M-LOK | Aluminum | $119.97 |
🧠 What Makes a Great 15” Handguard?
When choosing a 15 inch rail for your AR-15, consider the following:
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Material: Carbon fiber is ultra-lightweight, while aluminum offers rugged dependability.
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Rail Style: M-LOK is the most popular for modular builds. Picatinny offers full-length rigidity.
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Weight: Ideal for shooters who need a long rail without front-end fatigue.
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Gas System Compatibility: Ensure your barrel and gas system match the rail length and clearances.
🔫 Compatible Platforms
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Mil-Spec AR-15 Uppers
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.223/5.56 NATO Barrels (16” recommended)
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Rifle- or Mid-Length Gas Systems
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Low-Profile Gas Blocks (for free-float rails)
Will not fit carbines with fixed front sight bases without modification.
🛠️ Installation Tips
Most 15 inch handguards come with:
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Barrel nut
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Anti-rotation hardware
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Hex/torx wrenches
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Installation instructions
If you’re comfortable working on your upper receiver, it’s a 30–45 minute DIY job. Otherwise, we recommend professional installation.
❓ Frequently Asked Questions
Will a 15 inch handguard fit a 16 inch barrel?
Yes. This is a very common setup. You’ll have about 1 inch of barrel exposed, ideal for a flash hider or compensator.
What accessories can I mount on a 15 inch M-LOK handguard?
You can attach lights, lasers, sling mounts, bipods, grips, backup sights, and more—any M-LOK compatible accessory will work.
What’s the difference between KeyMod and M-LOK?
Both are modular mounting systems, but M-LOK has become the industry standard for modern AR builds due to wider compatibility and support.
Is carbon fiber better than aluminum?
Carbon fiber is lighter and absorbs heat differently, but costs more. Aluminum is more rugged and generally more affordable.
🛒 Order Your 15 Inch Handguard Today
At Mounts Plus, we stock the best 15” AR-15 handguards for every shooter, from lightweight competition builds to full-duty tactical rifles.
✅ Lightweight & durable
✅ M-LOK, KeyMod & Picatinny models
✅ Top brands & USA-made options
✅ Ships fast from our U.S. warehouse
✅ Expert customer support9]