Tacfire Gas Fire for AR-15 Mid-Length .750 Low Profile 11.75"
The TacFire gas block and tube assembly for AR-15 mid-length systems gives you a straightforward, no-fuss solution for your build or replacement needs. This .750 low-profile gas block is designed to work with mid-length gas tubes, keeping your setup reliable without unnecessary bulk on the rail. Whether you're assembling an AR from scratch, upgrading an existing rifle, or just need a solid backup component, this assembly handles the job without drawing attention to itself—exactly what you want from a gas system.
Low-profile gas blocks sit lower on your barrel, so they won't interfere with your sight picture or rail space. The .750 diameter matches mid-length systems, which are a popular sweet spot for 16-inch barrels and general-purpose AR builds. This is a complete gas block and tube assembly, so you're getting both pieces ready to go—no hunting for a matching tube separately.
If you're building an AR or swapping out worn parts, you'll appreciate the straightforward design. TacFire keeps things simple and functional, and this assembly reflects that ethos. The mid-length gas system itself tends to run softer than carbine-length setups, which some shooters prefer for accuracy and recoil management. Whether you're running a budget build, a dedicated range rifle, or a hunting AR, this gas block and tube assembly will get you running.
Key Features
- .750 diameter gas block designed for mid-length systems
- Low-profile design minimizes rail interference and sight obstruction
- Complete assembly includes gas block and tube—ready to install
- Straightforward, reliable design for AR-15 builds and upgrades
Specifications
| Brand | TacFire |
| Tube Length | 11.75" |
| Gas Block Diameter | .750 |
| Gas System Length | Mid-length |
| Platform | AR-15 |
| Type | Gas block and tube assembly |
| Profile | Low-profile |
Frequently Asked Questions
Will this gas block fit my AR-15 build?
This assembly is designed for AR-15 platforms with mid-length gas systems. The .750 diameter and 11.75" tube length are sized for mid-length setups, typically used on 16-inch barrels. Verify your barrel and gas system length before purchasing.
What's included in this assembly?
You're getting both the gas block and the gas tube as a complete assembly—no additional parts needed to install it on your barrel.
Why choose a low-profile gas block?
Low-profile blocks sit lower on your barrel, keeping your rail clear and your sights unobstructed. They're ideal if you're running optics or iron sights and want maximum usable real estate on your handguard.
Is this suitable for a new build or a replacement?
Yes—this is a complete assembly that works whether you're assembling a rifle from the ground up or replacing a worn or damaged gas system on an existing rifle.

