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The LBE Unlimited .750 Railed Gas Block solves one of the more common headaches in an AR build: getting a front sight to line up cleanly with the rear. Instead of sitting low like a standard gas block, this one is built to upper receiver height, so the integrated Picatinny rail lands on the same plane as your flat-top receiver. That means you can run a standard same-plane flip-up front sight without hunting for one of those taller, harder-to-find gas-block-height sights.
This one shines on builds that use a shorter handguard where the gas block is left exposed, or on rifles like the M&P Sport where you want to lose the A-frame front sight tower and mount a folding backup instead. Because the rail matches receiver height, your front post and rear aperture register with each other the way they should. It's a clean, straightforward fix that keeps your sight radius useful and your setup looking right.
It's machined from 7075 aluminum with a black anodized finish, which keeps weight down while holding up to the heat and wear that comes with the gas block position. It fits .750 diameter barrels and clamps on with the three included set screws, so there's no pinning or gunsmithing required to get it mounted. LBE Unlimited builds these in the USA, and they've earned a solid reputation as a no-nonsense parts maker for folks putting together their own uppers.
If you're building out an AR and want front sight options without the old-school sight tower, this gas block is a smart, budget-friendly piece to work into the mix. Pair it with a same-plane BUIS up front and you're set.
Because the rail sits at the same height as your flat-top receiver, you'll want a standard same-plane (rail-mount) front sight, the same type you'd mount anywhere on a handguard rail. You do not need the taller gas-block-height sights that pair with low-profile blocks. This lets your front post and rear aperture line up correctly for a proper zero.
Yes, this gas block fits standard .750 diameter barrels, which covers the M&P Sport and most common AR-15 barrels. It's a popular pick for folks wanting to remove the factory A-frame front sight tower and run a folding backup instead. Just confirm your barrel measures .750 at the gas block seat before ordering.
It's a clamp-on style block that secures with the three included set screws, so no taper pins or gunsmithing are required. A dab of thread locker on the set screws is a good idea to keep everything put under recoil. Make sure the gas port lines up with the hole in the block during install.
It's machined from 7075 aluminum with a black anodized finish, which keeps the weight down while standing up to the heat at the gas block position. LBE Unlimited manufactures these in the USA. It's a solid, budget-friendly option for home builds.
| UPC | 784682014608 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARRGB-UH |
| Color | Black |
| Model | |
| Product Type | Gas Block |
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