Cross Machine Tool UHPR Mod 1 M-LOK AR-15 Handguard - 15"

Manufactured by Cross Machine Tool
Manufactured by Cross Machine Tool
1 Review
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The Cross Machine Tool UHPR MOD 1 Rails feature a weight saving reduced Picatinny top rail and lightening cuts. M-LOK slots at the 3, 6, and 9 o'clock positions offer plenty of room for expansion. Easy to install, this rail requires no barrel nut shims for installation.


  • 6000 series extruded aluminum rail, MIL-SPEC Type III Class 2 hardcoat anodized
  • 7075 aluminum barrel nut, Type III Class 2 hardcoat anodized
  • M-LOK compatible
  • 17-4 PH cored stainless steel rail mounting attachment
  • Anti-rotation tabs time rail to upper receiver
  • Tapped hole for optional bipod/sling attachment point
  • 4 QD sling sockets
  • Includes barrel nut wrench
  • Compatible with most low-profile gas blocks
  • Inside diameter: 1.315"
  • Barrel nut diameter: 1.378"
  • Weight: 10.7 oz
  • Made in the U.S.A.
Cross Machine Tool Co., utilizing the latest machining technologies, offers high quality products that you’ll be excited to own.
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Accessory AttachmentM-LOK
BrandCross Machine Tool
FinishHardcoat Anodized
Gas System LengthExtended Rifle
Handguard Length15
Inner Diameter1.32 in
MaterialAluminum - 6000 Series
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

Ratings & Reviews

1 review

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Another great slim rail option.


I bought the 13.7" model to replace a 9" Midwest Industries rail, and could not be happier with it. The qaulity of the machining and anodising is top notch. I also like the barrel nut and attachments system better than the MI. Installation took no time at all. All the edges are smooth an comfortable. It is a little pricey compared to some of the other rails but you can tell where the money goes.