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The LBE Unlimited ARLGB-M takes one of the more annoying steps out of an AR-15 build. Instead of handing you a bare block and a loose gas tube to pin together on a bench block, LBE ships this one with the mid-length gas tube already installed. That means less time fumbling with a roll pin punch and more time getting your barrel dressed and your handguard on. It's built for .750 diameter gas block journals, which is the most common size on AR-15 barrels, and the low profile shape is designed to tuck neatly under a free-float handguard or rail.
The block is machined from steel and finished in black nitride, a treatment that does a good job resisting rust and holding up to the constant heat cycling a gas block lives through. The gas tube itself is made from 304 stainless seamless tubing, which is the material you want sitting right over the gas port taking the brunt of hot gas on every shot. It's a straightforward, no-nonsense part that does exactly what a gas block should without adding weight or bulk under your rail.
The mid-length designation refers to the gas system, so this pairs with barrels cut for a mid-length gas port, most often 16 inch and up. Mid-length setups tend to run a little softer on the shoulder than carbine systems thanks to the longer dwell, which is part of why they've become so popular on general-purpose rifles. It secures with set screws, and a lot of builders like to dimple the barrel underneath so the block can't rotate and the ports stay aligned. A dab of thread locker on the screws is cheap insurance against loosening under recoil.
Whether you're swapping out an old front sight base for a cleaner low profile look or spec'ing parts for a fresh build, this LBE gas block covers the fundamentals and comes ready to bolt on. Made in the USA rounds it out.
Yes. This is one of the main selling points of the ARLGB-M, since LBE installs the mid-length gas tube at the factory. That saves you the step of aligning the tube and driving in the roll pin yourself, which can be tricky without a bench block and the right punches.
It's sized for a .750 inch gas block journal, which is the most common diameter on AR-15 barrels. Because it's a mid-length setup, you'll want a barrel that's ported for a mid-length gas system, typically 16 inches or longer. Always confirm your barrel's journal diameter and gas system length before ordering.
It mounts using set screws that clamp down onto the barrel. Many builders dimple the barrel where the screws land so the block can't spin and the gas ports stay lined up. A little blue thread locker on the screws helps keep everything from backing out under recoil.
That's exactly what the low profile design is for. It sits close to the barrel so it clears the inside of most free-float handguards and rails. This makes it a popular choice when upgrading from a bulky front sight base to a cleaner, full-length handguard.
| UPC | 784682014622 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARLGBM |
| Model | |
| Product Type | Gas Block |
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