
17 Inch Handguard for AR-15 | M-LOK Free-Float Rails
17 Inch Handguard for AR-15 – M-LOK, Free-Float, Lightweight Options
Maximize your rifle's accuracy, balance, and accessory space with a 17 Inch Handguard—the ultimate rail system for long-barrel AR-15 builds. At Mounts Plus, we carry a curated selection of precision-engineered 17” handguards, featuring M-LOK compatibility, free-float construction, and ultra-lightweight designs from the top brands in the industry.
Whether you’re shooting suppressed, building a DMR platform, or outfitting a competition rig, our 17” handguards provide unmatched performance and aesthetics.
✅ Why Choose a 17 Inch Handguard?
A 17-inch handguard gives you maximum rail coverage for your AR-15. Designed to pair perfectly with 18” and 20” barrels, these handguards provide:
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🧲 More room for accessories – Mount optics, bipods, lights, and more
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🔩 Free-float precision – Reduces barrel contact for improved accuracy
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🔥 Superior heat dissipation – Extended length and venting improve cooling
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⚙️ M-LOK modularity – Attach gear at 3, 6, 9 o’clock and Picatinny top rails
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💪 Built to last – Aircraft-grade aluminum or carbon fiber options
📊 Top 17 Inch Handguards We Recommend
Product Name | Type | Material | Weight | Price |
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JL Billet 17" M-LOK Free-Float | Free-Float | Aluminum | 11.2 oz | $174.95 |
UM Tactical 3-Gun M-LOK Handguard | Free-Float | Aluminum | 10.7 oz | $209.00 |
Coda Evolution Carbon Fiber 17” | Free-Float | Carbon Fiber | 6.5 oz | $251.99 |
All models come with barrel nuts and mounting hardware.
Best Use Cases for 17" AR Handguards
These long handguards are ideal for:
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🔘 Precision AR-15 builds (DMR or SPR setups)
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🔘 Suppressor use – covers and protects part of the suppressor
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🔘 3-Gun competition rifles
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🔘 18" or 20" barrel platforms
🛠️ Compatibility & Installation
All 17” handguards listed:
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Fit standard mil-spec AR-15 upper receivers
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Are compatible with low-profile gas blocks
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Require simple tools and include mounting hardware
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Offer M-LOK slots along the sides and bottom
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Include a full-length Picatinny rail on top (most models)
For carbon fiber models, check compatibility with suppressor overhangs.
❓ Frequently Asked Questions (FAQs)
Will a 17 inch handguard fit a 20” barrel?
Yes. A 17” handguard pairs well with 18” and 20” barrels, leaving enough space for muzzle devices and accessories.
Is a 17” handguard too long for home defense?
While possible, 17" rails are best for long-range and competition setups. Consider shorter rails for CQB/home defense builds.
Is carbon fiber worth the price over aluminum?
If weight is a concern, carbon fiber offers exceptional strength and heat resistance at nearly half the weight.
Can I install this myself?
Yes. Most kits include barrel nuts and mounting hardware. Basic tools like a torque wrench and vise block make installation easy.
🛒 Shop 17 Inch AR Handguards at Mounts Plus
Mounts Plus is your go-to source for 17 inch AR-15 handguards, offering:
✅ Lightweight, modular rails
✅ Suppressor clearance on select models
✅ Trusted brands: JL Billet, UM Tactical, Coda Evolution
✅ Fast shipping from our U.S. warehouse
✅ Friendly customer support & installation tips