$12.99
3 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The TacFire MAR001CO is one of those parts that quietly makes your whole build come together. It's a clamp-on low profile gas block sized for .750" barrels, and its job is simple: replace that tall factory A2 front sight base so you can slide a modern free-float handguard over the top. The block sits low and tucks neatly under the rail, giving you that clean, uninterrupted look without a front sight post breaking up the profile.
It's CNC machined from steel and wears an erosion-resistant parkerized finish in black, so it holds up to the heat and gas that a block deals with round after round. The clamp-on design is a big part of the appeal here. Instead of set screws digging into the barrel at a single point, the clamp squeezes evenly around the barrel, which means no barrel dimpling is required to keep it locked in place. That makes install more forgiving, especially if you're building on a barrel that isn't pre-dimpled.
This is the piece that lets you run a mid-length, rifle-length, or extended handguard over a shorter gas system barrel. Once the old A2 sight is off, the low profile block clears the inside of most free-float rails with room to spare. If you're moving away from a classic carbine setup toward something with M-LOK or Picatinny real estate up front, this is the part that makes that swap possible.
Everything you need to mount it comes in the box, including the roll pin, screw set, and a hex wrench. The usual approach is to drive out the taper pins on the old front sight base, slide it off, align your gas port, seat the new block, and evenly tighten the clamp screws. It's a straightforward job for anyone comfortable working on their upper, and no permanent modification to the barrel is required. Keep in mind this is a fixed gas block, so it passes gas at whatever rate your port allows rather than offering adjustment.
No. Because this is a clamp-on design, the block squeezes evenly around the barrel rather than relying on set screws pressing into a single point. That means no dimpling is needed to keep it from shifting under heat or recoil, which makes it a good fit for barrels that aren't pre-dimpled.
It's built for .750" diameter barrels chambered in 5.56/.223, which is the most common barrel journal size on AR-15 builds. Measure your barrel at the gas port area before ordering to confirm you have a .750" journal and not a .625" or .875".
Yes, that's exactly what it's made for. The low profile shape tucks under most free-float rails, letting you run a mid-length, rifle-length, or extended handguard over a shorter gas system barrel. Just double-check the inner diameter of your specific handguard to be sure you have clearance.
No, it's a fixed gas block, so it passes gas at whatever rate your barrel's port geometry allows. If you want to tune gas flow for a suppressor or a specific buffer setup, you'd want an adjustable block instead. For a standard reliable build, a fixed block like this keeps things simple.
| UPC | 811261029071 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MAR001CO |
| Model | |
| Product Type | Gas Block |
You must be logged in to post a review.
Reviews
There are no reviews yet.