Midwest Industries Free Float AR-15 Handguard M-LOK - Slim Line - 12.625"

Manufactured by Midwest Industries
SKU: MI-SLH12625
MPN: MI-SLH12625
Manufactured by Midwest Industries
6 Reviews
$159.95 $167.95

Out of Stock

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Freefloat, M-LOK compatible handguards are the name of the game in the AR-15 world. Whether you are building a new rifle or simply upgrading an old one, changing your handguard can do many things like increasing accuracy, reducing weight, and adding customization options for lights, lasers, and optics. This Midwest Industries Slim Line rail does all three. With the free float design, the rail does not exert pressure on the end of the barrel like traditional two-piece rail systems allowing for better accuracy from your barrel. Because it only has a single rail on the top of the handguard, it eliminates unnecessary weight while also making it much more comfortable to hold. Even though there is less rails, the M-LOK attachment system allows you to quickly attach rail sections in only the positions that are needed so you can put accessories exactly where you want them, increasing ergonomics. This free float handguard comes with all the necessary hardware to secure it to your AR-15 and features a rounded profile that feels more slim and ergonomic in your hand.

  • 6061 aluminum type 3 hard coat anodized
  • Continuous MIL-STD 1913 picatinny top rail
  • 4140 heat treated barrel nut and torque plate
  • Three sides of M-LOK
  • Includes 5-slot polymer M-LOK rail
  • Includes barrel nut and barrel nut wrench
  • Includes two integral anti-rotation QD sling swivels
  • Overall length: 12.625”
  • Installed weight: 10.3 ounce
  • Outside diameter: 1.5”
  • Inside diameter: 1.3”

100% made in U.S.A. with Midwest Industries lifetime warranty
The MI Slim Line rail is compatible with all Mil-Spec forged upper receivers as well as the Midwest Industries Billet upper receiver. It features a slim design for increased ergonomics while also allowing room for gas blocks to fit underneath. However, it is not compatible with Piston AR gas systems. The included barrel nut is made from durable 4140 steel and is properly heat treated to withstand the high heat and pressure of the 5.56 caliber round. The handguard is designed to slip over the barrel nut without the need to screw it on like older designs. This allows it to be flush fit to the upper receiver and keeps the handguard from backing off over time.

Midwest Industries is a quality manufacturer of tactical weapons accessories. They produce handguards, rails, and iron sights for many of the most popular weapon platforms like the AR-15, .308, Sig MCX, AK-47, and many more. Their goal is to manufacture the highest quality parts at affordable prices backed by a lifetime guarantee.
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Accessory AttachmentM-LOK
BrandMidwest Industries
FinishHardcoat Anodized
Gas System LengthRifle
Handguard Length12.63
Inner Diameter1.3 in.
MaterialAluminum - 6061
Weight10.3 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

6 reviews

  • 3 stars
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  • 2 stars
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  • 1 star
  • 0 reviews

Free float hand guard.

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Great quality at a reasonable price

Sweet hand guard!

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Fits like a glove, very lightweight and the finish is awesome. Fits my 13.7 barrel nicely! I liked this so much I bought 2 more.

Good Quality, Decent Price, Excellent Shipping Time.


Good quality material, workmanship, fit, finish and performance. All for a decent price. But where P.A. shines is in fast shipping. I received my order in less than 24 hours, using USPS standard shipping. Well done Primary Arms!

MI rail

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Midwest Industries delivered exceptional quality as expected. I have several of their rails and mounts. Top tier quality at reasonable prices. And with Primary Arms, unbeatable prices, fast delivery times with excellent service. Also as expected.

Duty strength, lightweight

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Fantastic rail. Fit is perfect and snug. Has been on and off a few time and always locks back up solid. Put on a 12.5 upper with a YMH Phantom. The rail covers the whole barrel with just the muzzle device exposed.

Great product, great quality

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This thing is spot on for the cash! Bought two….