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The Midwest Industries Low Profile Gas Block is one of those parts that does its job and never gives you a reason to think about it again. Machined from 4140 steel with a black finish, it's sized for barrels with a .750 gas seat and built low enough to slide under just about any free float or slimline handguard on the market. If you're pulling an old A2 front sight base and moving to a full length rail, this is exactly the kind of block that makes the swap clean.
The big draw here is the three set screw design. Most micro blocks get by with two, but the extra screw gives you a more secure, wobble-free lockup and takes the guesswork out of alignment. Builders consistently point out how solid it feels once torqued down, and a drop of blue thread locker on the screws is all it takes to keep everything put through plenty of rounds. At roughly 1.810 inches long, it also runs a touch longer than the compact blocks, which is a real advantage when you're covering taper pin holes left over from a removed FSB.
This one is made for a .750 outside diameter gas seat, so double check your barrel journal before ordering. Installation is straightforward for anyone comfortable working on an upper: use the rear set screw to line up the gas port, snug the rest against the barrel, and you're good. Dimpling helps with alignment but isn't required to keep it locked in. It measures about 1.35 inches tall and .85 inches wide, so clearance under most rails is a non-issue, though it's always smart to confirm the inner dimensions of your specific handguard on tighter builds.
Midwest Industries makes these right here in the States and stands behind them with a lifetime warranty. That reputation for quality is a big reason this block shows up on so many builds, from lightweight pencil barrels to heavier profiles. It's a no-nonsense upgrade that pairs strength, a clean profile, and dependable lockup in one affordable package.
It's designed for barrels with a .750 inch outside diameter at the gas seat, which is the most common size on AR-15 barrels. Measure your gas journal before ordering to be sure, since Midwest also makes this block in other diameters. If you're running a standard .750 profile, you're set.
No, dimpling isn't required. Use the rear set screw to align the block with your gas port, then snug the other two against the barrel. Dimpling mainly helps with alignment, and a small drop of blue thread locker on the screws keeps everything locked down solid.
The third set screw is one of the standout features of this block. It gives you a more secure, wobble-free hold compared to the typical two-screw micro blocks. Builders regularly mention how solid it feels once torqued down, which is peace of mind on any build.
The low profile design is made to sit under most commercially available handguards, including slimline and free float rails. At roughly 1.35 inches tall, clearance usually isn't a problem. On very tight rails it's worth checking the inner dimensions of your specific handguard first.
| UPC | 816537011514 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MCTAR-LPG |
| Color | Black |
| Length | 5.5000 |
| Model | |
| Product Type | Gas Block |
| Shipping Weight | 0.205 |
| Style | Low-Profile |
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