Aero Adj Low Profile Gas Block .750

The Aero Precision Adjustable Low Profile Gas Block in .750 is built for shooters who want real control over their AR platform's gas system. Whether you're running a suppressed rifle, dialing in a competition build, or just tired of eating excess blowback, this adjustable gas block lets you fine-tune your gun's balance precisely—not guess at it. The low-profile design slides under slim handguards like Aero's R-ONE and S-ONE without interference, so you don't have to compromise your build's ergonomics or aesthetics.

Setup and adjustment are straightforward. A spring-loaded detent holds the custom stainless-steel adjustment screw in place and clicks audibly as you make changes—15 settings total—so you know exactly where you are. No secondary set screws to back out under recoil, no guessing if you're still where you left off. The wrench included makes adjustments easy even with a handguard installed. And because carbon fouling is channeled into a sacrificial chamber instead of locking up your gas system, you can clean and service the block yourself without special tools or trips to the gunsmith.

Built from 4140 steel and DLC coated for durability, this gas block attaches via two 10-32 x 3/16 knurled set screws to any barrel with a .750 gas block journal. It's machined to tight tolerances and designed to be user-serviceable—a tool that works for you, not against you. One note: avoid threadlocker on the adjustment screw itself; if you use any at all on the set screws, stick to the removable kind.

Key Features

• Low-profile design fits under slim rail handguards without interference
• 15 gas adjustment settings with audible, repeatable click detents
• Spring-loaded detent holds adjustment screw securely—no secondary set screws needed
• Sacrificial carbon chamber prevents gas system lockup and provides cleaning access
• User-serviceable design allows field cleaning and maintenance
• Includes adjustment wrench sized to work under installed handguards
• Replacement spring and detent included
• 4140 steel with DLC coating for corrosion and wear resistance

Specifications

Frequently Asked Questions

Will this fit under my handguard?

Yes—the low-profile design is specifically engineered to work under slim rail handguards, including Aero Precision's R-ONE and S-ONE models, without interference. The included adjustment wrench is sized to reach the screw from underneath an installed handguard.

What barrel gas journal size do I need?

This gas block is compatible with barrels that use a .750" gas block journal. If you're unsure of your barrel's gas block dimension, check your barrel's documentation or ask your barrel manufacturer.

Can I use threadlocker on the set screws?

Aero Precision recommends against using any threadlocker on the gas block adjustment screw itself. If you choose to apply threadlocker to the barrel set screws, use only a removable (non-permanent) variety. Do not use threadlocker of any kind on the adjustment screw.

Is this gas block user-serviceable?

Yes. The gas block is designed so you can access and clean the carbon fouling chamber yourself using solvent. You can also service and adjust the gas system without special tools or gunsmith work.