CMC Triggers Low Profile Gas Block AR-15/LR-308, 0.750" ID, Stainless Steel Nitride Finish

If you're building a modern AR-15 or LR-308 with a slim, free-float handguard, a standard full-size gas block will stick out like a sore thumb—and worse, it'll interfere with your forend. The CMC Triggers Low Profile Gas Block is engineered specifically to solve that problem. Machined from 17-4PH stainless steel and finished in stainless steel nitride, this 0.750" ID gas block sits low enough to tuck cleanly beneath most contemporary handguards while maintaining full compatibility with your barrel and gas system.

The real value here is versatility. Because the CMC block keeps its profile minimal, you can run a rifle-length handguard on a carbine-length barrel and actually achieve that sleek, streamlined look without compromise. It's built tough enough for duty or competition use, yet light enough—at just 0.66 ounces—that it won't add unnecessary weight to your front end. Attachment is straightforward: a pair of hex set-screws lock it securely to your barrel, and it works with any standard mil-spec gas tube you already have.

Made in the USA, the CMC Triggers gas block reflects the kind of attention to detail you'd expect from a company known for precision triggers. Whether you're fine-tuning a precision rifle, maximizing your handguard options, or simply cleaning up the lines of a purpose-built AR, this block delivers the low-profile fit you need without any guesswork.

Key Features

• Low-profile design fits beneath most free-float handguards
• 17-4PH stainless steel with stainless steel nitride finish for corrosion resistance
• 0.750" inner diameter compatible with standard AR-15 and LR-308 gas journals
• Hex set-screw attachment for secure, repeatable mounting
• Works with all standard, mil-spec gas tubes
• Ultralight at 0.66 ounces
• Manufactured in the USA

Specifications

Frequently Asked Questions

Will this gas block fit under my handguard?

Yes—the CMC Triggers low-profile design is specifically engineered to fit beneath most free-float handguards on the market. It's ideal if you want to run a rifle-length forend on a carbine-length barrel without clearance issues.

What gas journals does this fit?

This block is designed for 0.750" ID gas journals, which are standard on most AR-15 and LR-308 platforms.

Can I use this with my existing gas tube?

Yes. The CMC Triggers low-profile gas block is compatible with all standard, mil-spec gas tubes, so you can use the tube you already have.

How do I attach it to my barrel?

The block secures to your barrel using a pair of hex set-screws for a clean, reliable fit.