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Faxon 3-Screw .625” Low Profile Gas Block – Precision Fit for Lightweight Barrels
When you're building a lightweight or pencil-profile AR-15, every component matters. The Faxon 3-Screw .625” Low Profile Gas Block is designed to give your rifle rock-solid gas system performance without the need for pinning. Its triple screw clamp-on design maximizes surface contact, ensuring stability even under high round counts.
Crafted from high-strength steel and finished with QPQ nitride for enhanced corrosion resistance, this gas block is ideal for .625” diameter barrels — often found on lightweight and match-grade builds. The low-profile design ensures smooth clearance under most free-float handguards, while the clamp system offers easy alignment during installation.
Whether you're replacing an old gas block or completing a new upper, this is a reliable, USA-made upgrade trusted by serious shooters.
Key Features:
- 3-screw clamp-on design for tight, no-slip fit
- Fits barrels with a .625” gas journal (lightweight or pencil profiles)
- Low-profile shape for handguard compatibility
- QPQ nitride finish for strength and corrosion resistance
- Made in the USA by Faxon Firearms
Faxon 3-Screw .625” Low Profile Gas Block – Precision Fit for Lightweight Barrels
When you're building a lightweight or pencil-profile AR-15, every component matters. The Faxon 3-Screw .625” Low Profile Gas Block is designed to give your rifle rock-solid gas system performance without the need for pinning. Its triple screw clamp-on design maximizes surface contact, ensuring stability even under high round counts.
Crafted from high-strength steel and finished with QPQ nitride for enhanced corrosion resistance, this gas block is ideal for .625” diameter barrels — often found on lightweight and match-grade builds. The low-profile design ensures smooth clearance under most free-float handguards, while the clamp system offers easy alignment during installation.
Whether you're replacing an old gas block or completing a new upper, this is a reliable, USA-made upgrade trusted by serious shooters.
Key Features:
- 3-screw clamp-on design for tight, no-slip fit
- Fits barrels with a .625” gas journal (lightweight or pencil profiles)
- Low-profile shape for handguard compatibility
- QPQ nitride finish for strength and corrosion resistance
- Made in the USA by Faxon Firearms
Looking for more ways to optimize your AR-15 build? Pair this .625 low profile gas block with one of our lightweight AR-15 barrels and a compatible gas tube for smooth, reliable cycling.
Need more options? Browse our full collection of AR-15 gas blocks to find clamp-on, adjustable, and pinned styles to fit your setup.
Don’t forget to explore other high-quality Faxon Firearms parts and browse our full line of AR-15 parts to complete your upper or full rifle build.
Frequently Asked Questions
Q: What barrel diameter is this gas block made for?
A: It's made for barrels with a .625” gas journal, commonly found on lightweight or pencil-profile AR-15 barrels.
Q: Do I need to pin this gas block to the barrel?
A: No. It uses a 3-screw clamp-on system that secures the block without pinning.
Q: Will this fit under my free-float handguard?
A: Yes — the low-profile design makes it compatible with most modern slim-profile AR-15 handguards.
Q: Is it compatible with standard AR-15 gas tubes?
A: Absolutely. This gas block works with carbine, mid-length, and rifle-length AR-15 gas tubes.
Q: What is the block made from?
A: It’s built from high-strength steel and finished with QPQ nitride for enhanced durability and resistance to heat and corrosion.
Looking for more ways to optimize your AR-15 build? Pair this .625 low profile gas block with one of our lightweight AR-15 barrels and a compatible gas tube for smooth, reliable cycling.
Need more options? Browse our full collection of AR-15 gas blocks to find clamp-on, adjustable, and pinned styles to fit your setup.
Don’t forget to explore other high-quality Faxon Firearms parts and browse our full line of AR-15 parts to complete your upper or full rifle build.
Frequently Asked Questions
Q: What barrel diameter is this gas block made for?
A: It's made for barrels with a .625” gas journal, commonly found on lightweight or pencil-profile AR-15 barrels.
Q: Do I need to pin this gas block to the barrel?
A: No. It uses a 3-screw clamp-on system that secures the block without pinning.
Q: Will this fit under my free-float handguard?
A: Yes — the low-profile design makes it compatible with most modern slim-profile AR-15 handguards.
Q: Is it compatible with standard AR-15 gas tubes?
A: Absolutely. This gas block works with carbine, mid-length, and rifle-length AR-15 gas tubes.
Q: What is the block made from?
A: It’s built from high-strength steel and finished with QPQ nitride for enhanced durability and resistance to heat and corrosion.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to - www.P65Warnings.ca.gov.
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