ARS Rail System



The F4 Adaptive Rail System (ARS) is a purpose-built rail combining the functionality of the M1913 Picatinny rail and the adaptability of Magpul’s MLOK system. The ARS handguard features both, maintaining a seamless low profile and versatile configuration. Our Patent Pending MLOK and Picatinny hybrid system is directly integrated into the extruded profile of the rail, rather than a bulky quad rail configuration. No more adapter rails; accessories are attached directly to the rail. Strategic machining allows for maximum venting, air flow, and weight reduction while maintaining the structural integrity to maintain accuracy and repeatability. The barrel nut features an anti-rotation design. This modular system allows the flexibility to configure the rail based on the end-users individual preferences.


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Product Description

Technical Specs:

  • Material: Aerospace Grade 6061 T6 Aluminum
  • Functionality: Compatible with M-LOK and M1913 Picatinny accessories without the need of rail adapters.
  • Quick-Disconnect (QD) ports (2)
  • Length: 8.3, 10.1, 13.6, and 15.8 inches
  • Finish: Type III Hard Coat Anodized
  • Additional M-LOK slots at (2) 45° Positions for forward mounting lights, lasers, etc.
  • Extended Rail Section at 6 o’clock position at forward section of rail to accommodate slide on Bi-Pods
  • Barrel Nut Diameter:  1.378″
  • Barrel Nut:  7075 Aluminum Type III Hard Anodized Clear (Bronze Finish)
  • Anti-Rotation Tabs
  • 17-4PH Cored Stainless Steel Rail Mounting Attachment – Patent Pending by CMT
  • Barrel Nut Wrench Included
  • Weight: 12.8 ounces (15.8″), 10.5 ounces (13.6″), 8.8 ounces (10.1), TBD (8.3″)
  • Made in America with American Metal

**** The measurement for the rail was taken at its longest point, which is the bottom.  The top of the rail is 7.7″ (8.3″ version), 9.5″ (10.1 version), 12.8″ (13.6″ version) and 15″ (15.8″ version)

None of what we do would be possible without the brave men and women in the military and emergency services.  To show our appreciation we offer a 15% Discount to all active duty, retired, and veteran military members and first responders.  Please contact us before purchase.

Additional information

Weight .75 lbs
Dimensions N/A
Handguard Length

10.1 Inches, 13.6 Inches, 15.8 Inches, 8.3 Inches


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