Aero Precision Low Profile Adjustable Gas Block AR-15, LR-308 Nitride

Fine-tune your AR-15 or LR-308 gas system with the Aero Precision Low Profile Adjustable Gas Block in nitride finish. Whether you're running a suppressed rifle, building a competition gun, or simply want tighter control over your gas tube pressure, this gas block lets you dial in the exact amount of gas your bolt carrier needs—no guesswork, no permanent changes. The low-profile design fits seamlessly under slim handguards like Aero's own ATLAS series, keeping your setup clean and free of snags.

What makes this gas block worth the upgrade is the engineering behind it. Fifteen distinct adjustment settings give you granular control, each one locked in with repeatable audible clicks. The stainless steel adjustment screw won't slip under recoil the way loose set screws sometimes do. A spring and detent hold everything in place, and the machined 4140 steel body is nitride coated for corrosion resistance and durability in the field. The sacrificial carbon chamber channels fouling away from critical surfaces and gives you a clean access point if you ever need to break carbon lockup—a real problem solver on suppressed builds or high-round-count days at the range.

Setup is straightforward: the gas block attaches via 10-32 x 3/16 knurled set screws to barrels with a .750 gas block journal. Aero includes an adjustment wrench sized to work even when your handguard is fully installed, so you don't have to tear down your gun to fine-tune. The user-serviceable design means you can clean and service the gas system without special tools or guesswork. If you've ever felt your AR kick harder than it should, or if you're building a precision or suppressed rifle and need to dial in your gas pressure, this is the tool to do it right.

Key Features

• 15 gas adjustment settings for precise tuning of system pressure
• Low-profile design clears slim-profile handguards, including Aero ATLAS series
• Spring and detent lock adjustment screw with audible clicks—no loose set screws
• Stainless steel adjustment screw resists wear and stripping
• Carbon sacrificial chamber prevents carbon locking and eases cleaning
• 4140 steel body with nitride coating for durability and corrosion resistance
• User-serviceable—clean and service your gas system without disassembly
• Includes adjustment wrench that works with handguard installed
• Includes replacement spring and detent

Specifications

Frequently Asked Questions

Will this gas block fit under my handguard?

Yes, the low-profile design is specifically engineered to fit under slim-profile free float handguards, including Aero Precision's ATLAS series. It maintains a compact footprint that won't snag or interfere with rail covers and accessories.

What gas block journal size does my barrel need?

This gas block is designed for barrels with a .750 inch gas block journal. If you're unsure of your barrel's journal size, contact your barrel manufacturer or check your build specs.

Can I adjust the gas block with my handguard installed?

Yes. Aero includes a 6 3/32 adjustment wrench that's sized to fit and turn the adjustment screw even when a slim handguard is fully installed, so you can tune your gas pressure without disassembly.

What comes in the box?

The package includes the assembled adjustable gas block, a 6 3/32 adjustment wrench for easy tuning, and replacement spring and detent components for service and maintenance.