Strike Industries Adjustable Gas Block for AR-15/LR-308, .750" ID, Steel Matte Finish

An adjustable gas block for AR-15 and LR-308 rifles lets you dial in your direct impingement system to run exactly how you want it—no guessing, no permanent fixes. The Strike Industries Adjustable Gas Block with .750" ID gives you repeatable control over gas flow with six selectable positions, including five pre-sized settings plus a fully closed option. That means you can tune for suppressed fire, different ammunition loads, or just cleaner, softer shooting without replacing hardware or buying multiple blocks.

Built in steel with a matte finish, this block is made to withstand hard use and won't attract unwanted attention in a fighting rifle setup or precision build. The straightforward design and indexed positions mean you can return to your preferred gas tune every time—critical if you're testing loads, running a suppressor, or switching between shooting environments. Whether you're an AR builder fine-tuning a new upper or an experienced shooter looking to optimize a rifle that's seen a lot of rounds, having real control over your gas system beats the one-size-fits-all approach.

Installation is direct and compatible with standard .750" ID barrels commonly found in mid-length and rifle-length systems on AR-15 platform rifles and LR-308 builds. The matte steel construction blends with most modern rifle aesthetics and won't add weight where it matters.

Key Features

• Six selectable gas flow positions: five pre-sized settings plus fully closed
• Repeatable indexing—return to the same gas tune every time
• Steel construction with matte finish for durability and low profile
• .750" ID compatible with standard AR-15 and LR-308 barrels
• Optimize for suppressors, different ammo loads, or softer recoil

Specifications

Frequently Asked Questions

Will this gas block fit my AR-15 or LR-308?

The .750" ID is standard for mid-length and rifle-length gas systems on AR-15 and LR-308 platforms. Verify your barrel's gas block journal diameter before purchase; this block is designed for .750" bores.

Can I use this with a suppressor?

Yes. Suppressed fire increases backpressure, and an adjustable gas block lets you dial down gas flow to reduce felt recoil, ejection speed, and bolt wear when running a can. The six positions give you flexibility to find the sweet spot for your specific setup.

What does the closed position do?

The fully closed setting allows you to shut off gas flow entirely. Some shooters use this for precision or specific testing scenarios, though most will use one of the five pre-sized open positions for normal shooting.

How do I know which position to use?

The gas block ships with five pre-indexed settings. Start with one of these and fire test rounds to see how your rifle cycles and ejects. The repeatable positions let you dial back to your preferred tune for consistent operation with your ammunition and configuration.