Daniel Defense 1 O'Clock Offset Rail Assembly

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The Daniel Defense 1 O'clock Offset Rail is optimized for mounting miniature red dot optics in the 1 O'clock (right-hand) or 11 O'clock (left-hand) positions for quick, non-magnified, transitions when employing magnified primary optics on AR-type rifles with MIL-STD-1913 rails. The geometry allows for zero cheek-weld shift during the transition. This facilitates very fast transitions from magnified to non-magnified optics, and back. The 1 O'clock Offset Rail can also be used to mount a variety of lights or other accessories that mount to a MIL-STD-1913 rail. By flipping the part upside-down, one can mount a light in a good position for use with a vertical foregrip.

Updated for 2014, the 1 O'Clock Offset Rail now utilizes our patented Rock and Lock one piece mounting system, creating an even more robust and streamlined mounting surface as well as simplified installation on any MIL-STD-1913 picatinny rail..

All Daniel Defense Rails are built to the 1913 Military Specification and are 100% Quality Assurance checked for conformity to the specification.

  • Optimized for Miniature Red Dot Optics
  • Zero Change in check weld for transitions
  • Super-Fast Transitions
  • Adaptable for other uses
  • Light weight


  • Aircraft Grade 6061-T6 Aluminum
  • Military Specification Type III Hard Coat Anodized
  • Made in the USA!


All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship. If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your rail system in the most expeditious and inexpensive manner possible. Daniel Defense does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer's products. Be sure to retain your sales slip as proof of purchase date when making a claim.

***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

4 Reviews

  • 5
    Daniel Defense 1 O'Clock Offset Rail Assembly

    Posted by anonymous on Sep 22nd 2016

    Got a Burris fast fire 2 scope with the red dot on top and I hated moving my head off of the buttstock to use the red dot so I got the 1 o' clock offset and it makes so much difference and I don't fog up the glass on the scope, and I can make my transitions so much faster.

  • 5
    Great quality, quick shipping

    Posted by Dan Cord on Sep 22nd 2016

    Product was simple to add on to my rifle, functions as performed, and is low key as an offset rail.

  • 5
    Off The Rail

    Posted by Ray Gustafson on Jun 10th 2016

    This DD 1 o'clock mount is perfect. Built like a crowbar and positions a red dot, reflex sight, or weapon light exactly where you want. Strong recommendation for this product.

  • 5
    Offset Rail

    Posted by John Patterson on Mar 19th 2016

    Received quickly, very high quality unit. Works great. (used for offset red dot install on M4)