• One piece free-float design
  • Continuous MIL-STD 1913 Picatinny top rail with notch cut to save weight
  • Lightweight and slimline profile
  • M-LOK slots at the 3, 6, and 9 o'clock position
  • Offered in multiple lengths to accommodate different barrel lengths and different needs


  • Material: 6061-T6 Aluminum
  • Finish: Mil-Spec Type III Hardcoat Anodized
  • Weight (with Barrel Nut):
    • 4-inch: 5.36 oz.
    • 6.7-inch: 6.28 oz.
    • 9.5-inch: 7.62 oz.
    • 13-inch: 9.66 oz.
    • 15-Inch: 10.62 oz.
  • Inner Diameter: 1.36"
  • Height: 2"
  • Width: 1.58"

Installation Torque Recommendations:

  • Barrel Nut 30-45 ft-lbs
  • Screws 10-15 in-lbs


  • Mil-Spec AR-15 upper


  • 1x Battle Arms Development WORKHORSE Free-Float M-LOK Rail
  • 1x Barrel Nut
  • 3x Mounting Screws
  • 1x Mounting Nut


The handguard on your AR-15 can make a lot of difference when it comes to the control, feel, and appearance of your rifle. Standard polymer handguards with Picatinny rails on all sides are great, but if you want a handguard that makes your AR-15 look high-end, and help you shoot better, the Battle Arms Development WORKHORSE Free-Float M-LOK Rail is the way to go.

One-Piece Design

TheBattle Arms WORKHORSE Rail is made in a single piece instead of standard two-piece rails on AR-15s. The one-piece design makes it more reliable and resistant to breaks and cracks. Moreover, the rail has a free float design, which means that it does not affect barrel harmonics, and can improve accuracy as well.

Made From High-Quality Materials

The Battle Arms Free Float workhorse rail is made from durable and high-quality 6061-T6 Aluminum. The Aluminum rail has multiple advantages over a standard polymer rail. It is much more resistant to heat distortion, so even after excessive sustained fire, the rail won't distort, and all of your accessories will stay in place.

The Aluminum rail might be slightly heavier than some polymer versions. However, it is still very lightweight and looks a lot better, especially with the M-LOK slots.

Perfect for Mounting Accessories

The accessories you mount on your rifle can make a lot of difference in terms of their performance. For instance, if you intend to use your rifle for self-defense, you need to have a good light on it, and if you are using it to shoot at the range, a foregrip or bipod can make a lot of difference.

The Battle Arms Workhorse rail is made to be compatible with a wide range of accessories. It features a continuous Mil-Spec 1913 Picatinny top rail for mounting sights, lasters, and any other accessories you want. The Picatinny top rail also has a notch cut to save weight.

You also get M-LOK slots at the 3, 6, and 9 o'clock positions, allowing you to attach a wide range of lights, lasers, and grips to your rifle to make it more versatile and practical.

Available in Multiple Lengths

The Battle Arms WORKHORSE Rail is offered in multiple lengths to accommodate different length barrels. It is available in 4-inch, 6.7-inch, 9.5-inch, 13-inch, and 15-Inch versions. All the sizes have a slimline design, which is lightweight and more comfortable to grip. Plus, it looks really cool on your rifle.

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