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The Midwest Industries Combat Rail 4.5-inch is a compact free float handguard built for AR-15 rifles running short barrels, pistol builds, or anything where you want to trim the front end down without giving up mounting real estate. It's a one-piece design machined from 6061-T6 aluminum and finished in Type III hard coat anodizing, so it shrugs off the abuse of range days and hard use. At around 5.3 ounces installed, it keeps weight off the muzzle end while still feeling rock solid in the hand.
Up top you get a continuous MIL-STD 1913 Picatinny rail that lines up clean with your upper receiver, giving you a straight run for backup irons or a scanning light. The remaining seven flats are loaded with M-LOK slots, so you can hang lights, lasers, hand stops, or a bipod exactly where you want them. Midwest also machined in two anti-rotation QD sling sockets, which means you can run a sling without eating up an M-LOK slot or bolting on an extra adapter. A 5-slot polymer M-LOK Picatinny section comes in the box for anything that still needs a rail interface.
Installation is about as painless as free float rails get. The included 4140 heat treated barrel nut and patented torque plate mean there's no timing to fuss with, so you torque the nut, slide the handguard on, and lock it down. Builders regularly call out how straightforward this setup is, and the anti-rotation tabs key against the receiver to keep everything indexed under recoil. You'll want a 1/2-inch drive torque wrench to pair with the included MI wrench, and the rail fits standard forged upper receivers.
The outside diameter runs a slim 1.5 inches with a 1.3-inch inside, so it fills the hand comfortably without feeling bulky. Every edge is dehorned and deburred, it's made in the USA, and Midwest stands behind it with their lifetime warranty. For a short, no-nonsense rail that punches above its price bracket, this one earns its spot.
It's built to fit standard forged AR-15 upper receivers and installs with the included barrel nut and torque plate. Billet uppers vary in dimension, so if you're running one it's worth confirming clearance with your receiver maker first. It is not intended for gas piston AR systems.
You'll want a 1/2-inch drive torque wrench to pair with the MI barrel nut wrench that comes in the box. The nice part is there's no timing required, so you torque the barrel nut, slide the rail over it, and clamp it down. Most builders find the whole process quick and drama-free.
Yes. The Combat Rail has two integral anti-rotation QD sling sockets machined right into the handguard, so you can run a push-button QD swivel without adding an M-LOK adapter. That keeps your slots free for lights, hand stops, or a bipod.
At 4.5 inches this is one of the shorter rails in the Combat series, which makes it a great match for pistol-length builds and short-barreled setups. You still get a full top Picatinny rail plus seven sides of M-LOK for accessories. If you need more real estate, Midwest offers this same rail in longer lengths.
| UPC | 812102032359 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MI-CRM4.5 |
| Color | Black |
| Length | 4.5 |
| Model | |
| Product Type | Free Float |
| Shipping Weight | 0.86 |
| Style | M-LOK |
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