Prometheus M4 Barrel Shim Ring Set -

LayLax Prometheus M4 Outer Barrel Adjustment Shim Ring Set (GG06-15)

  • $12.95


  • Eliminates gaps that may occur in between barrels and the barrel nut, upper receiver and outer barrel, or anywhere in between
  • Ensures stability of outer barrel and RIS systems when installing
  • Prevents any outer barrel or rail alignment issues
  • 3 differently sized shims to fit any situation