ERGO Low Profile Gas Block – .750
$24.95
Elevate your AR-15 or AR-10 with the ERGO Low Profile Gas Block .750. Made in the USA from durable 4140 chrome moly steel, this precision-machined gas block ensures tight tolerance control. Its black phosphate finish and locking screws offer secure installation, perfect for competitive shooters and range enthusiasts alike. Upgrade your rifle with this quality-made gas block for enhanced performance and reliability.
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Low Profile Gas Block – .750
If you’re looking for a top-quality, made-in-the-USA low profile gas block for your AR-15 or AR-10, look no further than the ERGO Low Profile Gas Block – .750. This precision-machined gas block is constructed from 4140 chrome moly steel and designed to fit barrels with a gas seat area diameter of .750. It features a black phosphate finish and comes with locking screws for a secure install. Whether you’re a competitive shooter or just enjoy hitting the range for some plinking, the Low Profile Gas Block is an excellent choice.
Ergo Gas Block 750 Specs:
- Made in USA Low Profile Gas Block for AR-15 / AR-10
- Made From 4140 Chrome Moly Steel
- Fits 0.750″ Regular Barrel and Standard Gas Tube
- Precision Machined from Steel with Tight Tolerance Control
- Black Phosphate Finish
- Includes Locking Screws
- SKU: EG4821
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information: www.P65Warnings.ca.gov
Low profile gas blocks replace the standard front sight base on AR-15 and AR-10 rifles, sitting below the top rail so a free-float handguard can pass over them without interference. The .750 designation refers to the inner diameter of the gas block — designed to fit barrels with a .750-inch outside diameter at the gas block seat, which is the most common diameter found on mil-spec government-profile AR-15 barrels and many aftermarket options. Measuring the barrel journal before ordering is essential, as barrel diameters vary and an incorrectly sized gas block will not seat properly on the barrel. Low profile gas blocks are required on any rifle using a free-float handguard that extends past the gas port, since standard front sight bases are too tall to fit inside most free-float tubes or rail systems. Installation requires removing the existing front sight base and aligning the new block’s gas port with the barrel’s port before securing with the provided set screws. For AR builders upgrading to a free-float handguard or replacing a damaged front sight base, an Ergo low profile gas block provides a clean, lightweight solution compatible with any standard free-float rail system without adding unnecessary height above the bore.
| Weight | .5 lbs |
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Frequently Asked Questions
What barrel diameter does the .750 gas block fit?
The .750 designation refers to the inner bore of the gas block — it fits barrels with a .750-inch outside diameter at the gas block seat. This is the most common diameter on mil-spec and government-profile AR-15 barrels. Measure your barrel’s journal before ordering to confirm compatibility.
Why use a low profile gas block?
Low profile gas blocks sit below the top rail, allowing a free-float handguard to pass over them without interference. They are required on any build using a free-float tube or rail that extends past the gas port, replacing a standard front sight base that would be too tall to fit inside the handguard.
How is the Ergo low profile gas block secured to the barrel?
The Ergo low profile gas block uses set screws to clamp onto the barrel journal. The gas port on the block must be aligned with the barrel’s gas port before tightening. Some builders also apply thread-locking compound to the set screws to prevent loosening under recoil.
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