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AR-15 Gas Block with Rail – Add Versatility Without a Full Quad Rail

Looking to mount a front sight, laser, or backup optic on your AR-15 without adding a bulky rail system? A railed gas block is the perfect solution. Our AR-15 gas blocks with Picatinny rails are engineered for shooters who want maximum function with minimal weight — offering a clean and secure mounting surface right where you need it.

Whether you're upgrading a carbine or building from scratch, these gas blocks deliver the rugged reliability and compatibility serious AR owners expect.

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🔧 Why Choose a Gas Block with a Rail?

A gas block with a top-mounted rail provides a stable platform for:

• Front backup iron sights (BUIS)
• Laser aiming devices
• Micro red dots or optics
• Lightweight builds without quad rails

These railed gas blocks make it easy to co-witness your iron sights, add aiming accessories, or keep things minimalist with a sleek free-float handguard. They're ideal for tactical setups, range rifles, and duty-grade builds alike.

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🛠️ Styles We Offer

Each railed AR-15 gas block in our catalog is carefully selected for its performance, fit, and finish:

Clamp-On Gas Blocks

• No need to dimple the barrel
• Great for builders and clean installs
• Easy to remove or reposition

Set Screw Gas Blocks

• Secure mount for long-term setups
• Best used with dimpled barrels
• Solid performance under recoil

Flip-Up Sight Gas Blocks

• Combine a gas block and front sight in one unit
• Available with spring-loaded or manual flip-up mechanisms
• Ideal for backup sights and co-witnessing with optics

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⚙️ Compatibility and Specs

Most models fit standard .750” or .936” gas journals, and all feature:

• Mil-spec Picatinny top rails
• Compatibility with most free-float handguards
• Durable materials like steel or aircraft-grade aluminum
• Black nitride, phosphate, or anodized finishes

Not sure which size to choose? Check your barrel specs — we list compatibility for every product to ensure a perfect fit.

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🧰 Brands You Can Trust

We carry gas blocks with rails from trusted names like:

• SADLAK Industries
• EGW (Evolution Gun Works)
• PRI (Precision Reflex Inc.)

These are battle-tested components built to perform under pressure.

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🛒 Shop Railed Gas Blocks for Your AR-15 Today

Skip the weight of a full rail system — and get the flexibility of a top-mounted Picatinny gas block instead. Whether you need to mount a sight or streamline your setup, our clamp-on and set screw models deliver

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💬 FAQ

Q: What does a railed gas block do?
A: It adds a Picatinny rail section on top of the gas block, allowing you to mount front sights, lasers, or optics directly without a full quad rail.

Q: Can I use this with a free-float handguard?
A: Yes — low-profile railed gas blocks are designed to fit under or just behind free-float handguards without interference.

Q: Is a clamp-on gas block secure enough?
A: Absolutely. When properly torqued, a clamp-on gas block is strong and stable, especially for non-dimpled barrels.

Q: Will this replace my A2 front sight post?
A: Yes. If you're removing an A2 front sight/gas block combo, a railed gas block is a lightweight, modular upgrade that restores sight mounting capability.

Q: What barrel sizes do these gas blocks fit?
A: Most options fit .750” barrels, but we also stock .936” models. Always check your barrel’s gas journal diameter before ordering.

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