Fortis Mfg Billet Upper - Gorilla Arms

Fortis Mfg Billet Upper


The Fortis Billet Upper is a precision piece, machined from Billet 7075 T6 aluminum.  Like our other products, we designed this upper with function as well as form in mind.  We shaved off the ounces where we could without sacrificing rigidity or strength.  The end result is increased function and performance with the design aesthetics that we’re known for.  See for yourself and you’ll see and feel the difference with our products.



  • One Piece Billet Design
  • Aircraft Grade 7075 T6 aluminum
  • Military Specification Type III Hard Coat Anodized
  • Engraved logos on both sides as well as the top
  • 1913 picatinny rail flat top
  • Includes installed upper parts kit
  • Light weight at 8.6oz (including UPK)
  • Made in the USA!

Additional information

Weight 8.6 oz

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