Description
The Midwest Industries CRMHD-308L is the Combat Rail HD taken up a notch for large-frame builds. It's a one-piece, free-float handguard machined from 6061 hardcoat anodized aluminum, and everything about it is built around rigidity. The longer 4140 barrel nut, MI's patented torque plate, and heavy-duty anti-rotation tabs all work together to keep the rail from shifting forward or twisting under hard use. That matters a lot on a .308, where the extra recoil and heat can loosen up a lesser setup over time.
What Sets the CRMHD-308L Apart
This is the low-profile version, meaning the top rail sits closer to the receiver for a lower, cleaner sight line and minimal point-of-impact shift if you're running night vision or other aiming devices up top. You get seven sides of M-LOK for lights, lasers, hand stops, bipods, and grips, plus an included 5-slot polymer M-LOK rail section for mounting gear at the 12 o'clock position. Two steel anti-rotation QD sockets are built in for a solid, roll-resistant sling attachment point.
Fit and Install on Your AR-10
One thing worth sorting out before you order: large-frame .308 rifles aren't all cut the same. This handguard is designed for AR-10 pattern uppers, so if you're running a DPMS-pattern receiver, check with your upper's manufacturer on whether you need a high or low-height rail. Installation is straightforward and Midwest includes the barrel nut wrench in the box, which is a nice touch that plenty of other brands skip. Folks running everything from PA-10 receivers to rebarreled Aero uppers have reported clean fitment.
Built for the Long Haul
Midwest Industries products are 100% made in the USA and backed by the brand's reputation for quality that holds up in both duty and civilian builds. At roughly 15 inches, this rail covers a good stretch of barrel for a full-length grip and plenty of mounting space, all while keeping the slim, dehorned profile comfortable in the hands.
Key Specifications
- Manufacturer: Midwest Industries
- Manufacturer Part Number: MICRMHD308L15.0
- UPC: 812102035732
- Length: 15"
- Platform: AR-10 / LR-308
- Profile: Low Combat Rail HD
- Mounting System: M-LOK
- Material: 6061 Hardcoat Anodized Aluminum
- Finish: Black
- Barrel Nut: Longer 4140 Steel
- QD Sockets: Two Steel Anti-Rotation
- M-LOK Coverage: Seven Sides
- Design: One-Piece Free-Float
- Country of Origin: Made in USA
What’s Included
- Midwest Industries CRMHD-308L Low Combat Rail HD handguard
- Longer 4140 barrel nut
- Patented torque plate
- 5-slot polymer M-LOK rail section
- Barrel nut wrench
- Mounting hardware
Frequently Asked Questions
Will the CRMHD-308L Combat Rail HD fit my AR-10?
This handguard is built for AR-10 pattern large-frame uppers. Since .308 AR-type rifles aren't standardized the way AR-15s are, it's smart to confirm your upper's pattern before ordering. If you have a DPMS-pattern receiver, check with the manufacturer on whether you need a high or low-height rail, since this is the low version.
Does the handguard come with the tools to install it?
Yes, Midwest includes the barrel nut wrench right in the box, which is something a lot of brands leave out. Install is generally straightforward for anyone comfortable working on their AR. You'll still want the barrel in a vise block and a torque wrench to get the barrel nut set properly.
What's the difference between the low and high Combat Rail HD?
The low profile sits the top rail closer to the receiver for a lower sight line and minimal point-of-impact shift, which is helpful if you're running night vision or other aiming devices up top. The high version raises the rail height to match receivers with a taller tang. Matching the correct height to your specific upper is the key to a clean rail-to-receiver transition.
How many M-LOK slots and QD points does it have?
You get seven sides of M-LOK coverage running along the handguard for lights, lasers, bipods, grips, and hand stops. It also includes a 5-slot polymer M-LOK rail section for the 12 o'clock position. Two built-in steel anti-rotation QD sockets give you solid sling attachment points that resist rolling.





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