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AR-15 Gas Blocks – Adjustable, Clamp-On & Low Profile
AR-15 Gas Blocks – Adjustable, Clamp-On & Low Profile Options
Your AR-15’s gas block plays a key role in recoil control, cycling reliability, and suppressor tuning. Whether you’re building a custom rifle or upgrading an existing setup, the right gas block helps dial in performance for your specific use.
Why Upgrade Your AR-15 Gas Block?
Stock gas blocks work, but they often lack the adjustability and precision needed for optimized builds. By switching to a premium gas block, you can:
- Control gas flow for suppressed or unsuppressed shooting
- Improve reliability with different ammo types
- Reduce felt recoil for smoother operation
- Customize fitment with clamp-on, set screw, or low-profile designs
Gas Block Types Available
At Mounts Plus, we stock adjustable, clamp-on, and set-screw gas blocks from trusted brands including Superlative Arms, Sadlak, and PRI.
- Adjustable Gas Blocks – Ideal for suppressor users and tuning recoil.
- Clamp-On Gas Blocks – Secure hold with no barrel marring, great for clean installs.
- Low Profile Gas Blocks – Fits under free-float handguards, perfect for slim builds.
- Set Screw Gas Blocks – Rock-solid hold when properly installed with barrel dimples.
Available in .625", .750", .875", and .936" gas journal sizes to match your barrel.
How to Choose the Right AR-15 Gas Block
- Measure your barrel’s gas journal diameter.
- Decide if adjustability is important (especially for suppressors).
- Pick your attachment style: clamp-on, set screw, or low profile.
- Make sure your handguard has the clearance if using low-profile options.
Featured AR-15 Gas Block Brands
- Superlative Arms – Adjustable, bleed-off gas blocks
- PRI – Professional-grade low-profile designs
- Sadlak – Durable, field-tested options
Explore More AR-15 Gas System Components
For additional gas system upgrades, check out our clamp-on gas blocks and Superlative Arms adjustable gas blocks. You can also browse AR-15 barrels and AR-15 parts and accessories to complete your custom build.
Frequently Asked Questions (FAQ)
What size gas block do I need for my AR-15?
Measure your barrel’s gas journal diameter. Common sizes include .750", .875", and .936". The product description lists compatible sizes.
Why choose an adjustable gas block?
Adjustable gas blocks allow fine-tuning of gas flow, improving suppressor performance, recoil control, and overall cycling reliability.
What’s the difference between clamp-on and set-screw gas blocks?
Clamp-on blocks don’t require dimpling your barrel, making installation cleaner. Set-screw blocks hold tight when used with thread locker and barrel dimples.
Do low-profile gas blocks fit under all handguards?
Most modern free-float AR-15 handguards are compatible, but always double-check clearance specs.
Can I install an AR-15 gas block myself?
Yes. Most gas blocks are DIY-friendly with basic tools like Allen wrenches and a torque driver.