Strike Industries

Strike Industries REX Riser

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$31.95 - $33.60


The R.EX Riser is a low profile, lightweight riser for AR platforms. Set at the ideal height for co-witnessing while using the SI Reflex Exoskeleton mount with either A2 height, or Sidewinder sights (without spacer), the REX Riser is versatile and provides and solid mounting platform. While optimized for use with the R.EX Mount, the universal Picatinny pattern can be used with many other optics that can be mounted on picatinny sections.


  • Low profile rail riser
  • Lightweight, 2 0z total installed co-witness height.
  • Co-witness with A2 or Sidewinder Sight using R.EX Mount
  • 3 picatinny slot sections

Product Specifications:

  • Weight: 2 oz
  • Heights: W/ Spacer0.630 inches. W/out Spacer 0.530 inches, Spacer height: 0.100 inches
  • R.EX Exoskeleton will add 0.200 inches of height to either combination of the Rex Riser
  • Base: 6061-T6 Al, Requires 5 rail sections of space to properly mount.
  • Total Length of picatinny riser: 2.09 inches
  • Spacer: 6061-T6 Al
  • Clamp: Steel
  • Screw: Steel
  • Finish:
  • TIII Hard anodize (BK)
  • TII Color Anodize
  • Available color: Black, Blue, FDE, RED

Package include

  • 1x Riser Base
  • 1x M5x30mm Cap Head Hex Screw
  • 2x 10x3x.48mm spring
  • 1x Clamp
  • 1x Spacer
  • 1x Riser rail
  • 4x M3x6mm button head hex screw


  • Use the included spacer in conjunction with R.EX Mount for absolute co-witness with A2 height sights.
  • Use R.EX Mount with no spacer to co-witness with Sidewinder Sights only.

Note: Medium Strength Loctite Recommended (Included).

Note: Uses a proprietary picatinny rail design. Will work for most mil-spec 1913 style rail attachments however.

M3 Screw Torque Specs: Do not exceed 10 inch-lbs and only hand tighten by holding onto the short end of the allen key included.

M5 Bolt Torque Limit= 25 inch lbs maximum with thread locker.

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