45 Complete Pistol Upper


As with all quality weapons, you have to start with a solid base, and our JT-45 complete upper receiver is precision CNC-machined from solid aerospace billet aluminum. This complete upper receiver is perfect for any high-quality .45 pistol build. Add in our 9" free float handguard, and you have a very attractive, functional, and lightweight precision weapon.

  • T6 Aerospace-grade Billet aluminum lower and upper receivers
  • Nitride-treated precision machined 8.5" .45 Barrel
  • 1:16 twist rate
  • Reduced-friction black nitride bolt carrier group
  • MPI/HP tested bolt
  • 5/8-24 threads
  • Chamber .45
  • Extended M4 Feed Ramps
  • JT 9" Float M-LOK Rail
  • JT Flash Can recessed into handguard 
  • Billet 7075 Charging Handle with ambidextrous controls
  • Made in the USA

Warning: The shortest legal length barrel for a rifle is 16". The barrel length of this upper is shorter than 16". Check your local laws before using.

Recent reviews

5 out of 5 stars

45 Complete Pistol Upper

Really nice upper, I love the JT Flash Can it comes with which makes it look so sick. Performs great and paired it with the 80% lower for a great build.

Blake L.

February 13, 2024

5 out of 5 stars


Absolutely amazing quality upper! So far not a single issue and wouldn’t change a thing if I could.

kevin l.

February 5, 2024