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When you're moving away from a bulky A2 front sight or building a rifle from the barrel up, the CMC Triggers Low Profile Gas Block .750 is one of those parts that quietly makes the whole setup work. It's a low, narrow, one-piece design that slips inside most free-float handguards, which is exactly what you need if you want a full-length rail hugging a carbine or mid-length barrel. Machined from 17-4PH stainless steel and finished in black nitride, it shrugs off heat and corrosion in a spot on your rifle that sees plenty of both.
CMC has a long reputation for tight tolerances on their triggers, and that same attention shows up here. The 17-4PH stainless is heat treated and the nitride coating gives it a matte black finish that holds up under sustained fire. It weighs next to nothing, so it won't throw off the balance of a lightweight build, and the slim profile means most handguards drop right over it with no clearance headaches.
This block is made for barrels with a .750 inch diameter at the gas seat, which covers a huge chunk of AR-15 and AR-10 barrels on the market. It secures with two included hex head set screws and ships with a gas tube roll pin. For the most secure hold, a lot of builders dimple the barrel under the set screws so the screws seat positively and can't walk loose under recoil or heat. It plays nice with any CMC nitride gas tube or a standard mil-spec gas tube and hardware, so you're not locked into a proprietary system.
Whether you're chasing a clean, streamlined look or just need the clearance to run the handguard you want, this is a proven, made-in-the-USA piece that does its job and gets out of the way.
It's designed for AR-15 and AR-10 barrels that measure .750 inches in diameter at the gas seat, which is one of the most common barrel profiles out there. Always confirm the diameter at the gas port on your specific barrel before ordering, since some heavier or lighter contours run different dimensions. If your barrel is .750 at the seat, this block drops right on.
It clamps down with two included hex head set screws and ships with a gas tube roll pin. Many builders dimple the barrel under the set screws first so the screws have a positive seat and won't walk loose under heat or recoil. A drop of thread locker on the screws is also common practice for a secure, long-lasting hold.
Yes. It works with any standard mil-spec gas tube and hardware, as well as CMC's own nitride gas tubes. You're not tied to a proprietary system, so you can use whatever gas tube length your build calls for.
That's exactly what it's built for. The low, narrow one-piece profile tucks inside most free-float handguards, letting you run a rifle-length forearm over a shorter barrel for a clean, streamlined look. Handguard inner diameters vary, so it's worth double-checking clearance on tighter rails.
| UPC | 859464006291 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 81611 |
| Color | Black |
| Model | |
| Product Type | Gas Block |
| Shipping Weight | 0.145 |
| Style | Low Profile |
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