Fortis AR-15 and AR-10 Switch & Night Rail Barrel Nut Wrench / Spanner Wrench

SKU# 3377 | by Fortis Manufacturing
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The barrel nut wrench works to tighten both the 556/308 Switch barrel nuts as well as the Night Rail. The Night Rail comes with a tool, but the Switch rails do not. You can use the standard 3 prong DPMS tool for the 308 and a standard AR-15 spanner wrench for the 556 Switch rail. Please follow proper Switch installation procedures.


  • 4130 steel hardened to 38-40 RC
  • 556 Spanner wrench
  • 308 DPMS barrel nut compatible
  • Both 1/2 & 3/8 square
  • Black oxide coated
  • Made in the USA!

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