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Midwest Industries built the Slim Line to solve a common headache: rails that feel like you're gripping a soda can. This one runs a 1.5" outside and 1.3" inside diameter, so it fills the hand without the bulk. It's a one-piece design machined from 6061 aluminum and finished in a Type III hard coat anodize, which is the kind of coating that shrugs off the scrapes and grime a working rifle picks up. Everything is fully dehorned and deburred, meaning no sharp edges digging into your palm during a long day at the range.
The top runs a continuous MIL-STD 1913 Picatinny rail, giving you a straight, uninterrupted surface to run backup irons, a red dot, or a scan-and-clear setup up front. Down the sides and bottom you get M-LOK slots across seven flats, so lights, sling mounts, hand stops, and bipods only go where you want them. Two integral anti-rotation QD sling sockets are built right in, and a 5-slot polymer M-LOK rail section comes in the box for anything that still needs Picatinny.
Because the Slim Line free floats, nothing touches the barrel but the barrel nut. That keeps handguard pressure off your barrel and helps your point of impact stay consistent from shot to shot. The system uses a patented 4140 heat treated barrel nut and torque plate, and folks who've installed a few of these will tell you the guard locks onto the nut with real stiffness once torqued down. At 8.5 ounces installed, it keeps the front end light and quick to point.
This 9.25" length works with standard forged AR-15 upper receivers and isn't meant for gas piston builds. If you're running a billet upper, it's worth checking dimensions with your receiver maker first since billet specs vary. The barrel nut and wrench are included, so a well-equipped home bench and a vise block get you up and running without much fuss. Midwest backs it with their lifetime warranty, which says plenty about how they build these.
It's designed to fit standard forged AR-15 upper receivers and comes with its own barrel nut, so it isn't dependent on your existing nut. It is not made for gas piston AR builds. If you're running a billet upper, dimensions vary between makers, so it's smart to confirm fit with your receiver manufacturer before installing.
Yes. Midwest Industries ships it with their patented 4140 heat treated barrel nut, the wrench, a torque plate, and all the mounting hardware. You'll still want a vise block and a torque wrench to do the job right, but the core parts are all in the box.
You get M-LOK slots across seven flats around the handguard, plus a full-length MIL-STD 1913 Picatinny rail along the top for optics and sights. It also has two integral anti-rotation QD sling sockets and ships with a 5-slot polymer M-LOK rail section for anything that still needs a Picatinny surface up front.
A free float rail like the Slim Line attaches only at the barrel nut, so nothing puts pressure on the barrel itself. That helps keep your point of impact consistent, especially if you shoot with a sling or bipod. It also lets you mount accessories anywhere along the length without touching the barrel.
| UPC | 812102031000 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MI-SLH9.25 |
| Color | Black |
| Length | 11.0500 |
| Product Type | Handguard |
| Style | M-LOK |
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