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Uppers

Uppers

All upper receivers not chambered in 5.56x45 or .223 Remington come with one (1) caliber specific magazine. Capacity may vary depending on your State's laws.

When ordering an upper reciever unit please keep the following in mind: All complete uppers sold on-line come fully assembled, headspaced and test-fired. While each upper is made to mil-spec standards for dimensions and tolerances, uppers may fit differently on various lowers. Some may fit tighter than other, some may fit looser. Some may require minor fitting based on tolerance stacking. Each upper comes with a lifetime warranty and a 60 Day Satisfaction Guaranty. Please see our Warranty page for details.



Items 21 to 40 of 57 total

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  1. K10UR-FT: 16" 10mm Flat-top Upper K10UR-FT: 16" 10mm Flat-top Upper
    K10UR-FT: 16" 10mm Flat-top Upper
    K10ur-FT

    K10UR-FT: 16" 10mm Flat-top Upper

    Complete upper receiver assembly chambered in the wildly popular and affordable 10mm pistol cartridge. Standard forged 7076T6 aluminum Picatinny flat-top upper with one high capacity 18 round polymer magazine. Front sight and handguard options available.

    Learn More
    $721.50
  2. K40UR-FT: 16" 40 S&W Flat-top Upper Receiver K40UR-FT: 16" 40 S&W Flat-top Upper Receiver
    K40UR-FT: 16" 40 S&W Flat-top Upper Receiver
    K40UR-FT

    K40UR-FT: 16" 40 S&W Flat-top Upper Receiver

    Complete upper receiver assembly chambered in the wildly popular and affordable 40 S&W cartridge. Standard forged 7076T6 aluminum Picatinny flat-top upper with one high capacity 20 round polymer magazine. Front sight and handguard options available. Learn More
    $721.50
  3. K24P-10-UR-OR: 10mm 11.5" AR15 Pistol/SBR upper K24P-10-UR-OR: 10mm 11.5" AR15 Pistol/SBR upper
    K24P-10-UR-OR: 10mm 11.5" AR15 Pistol/SBR upper
    K24P-10-ur-or

    K24P-10-UR-OR: 10mm 11.5" AR15 Pistol/SBR upper

    10mm 11.5" Optics ready AR15 pistol or SBR upper Learn More
    $767.00
  4. K24P-10-UR: 10MM 11.5" AR15 Pistol/SBR upper K24P-10-UR: 10MM 11.5" AR15 Pistol/SBR upper
  5. K10UR-OR: 10mm Optics Ready Upper Receiver, 16" K10UR-OR: 10mm Optics Ready Upper Receiver, 16"
  6. K24P-300-OR-UR: 300 Blackout Upper K24P-300-OR-UR: 300 Blackout Upper
    K24P-300-OR-UR: 300 Blackout Upper
    K24P-300-or-ur

    K24P-300-OR-UR: 300 Blackout Upper

    300 Blackout caliber 11.5" AR15 pistol or SBR upper, optics ready upper Learn More
    $572.00
  7. K8T-204UR-SALE: Tactical Targetmatch Upper Receiver .204 Ruger cal. K8T-204UR-SALE: Tactical Targetmatch Upper Receiver .204 Ruger cal.
  8. K6T-Sale: 20"  Ultramatch Tactical Upper Assem. .223 Remington K6T-Sale: 20"  Ultramatch Tactical Upper Assem. .223 Remington
  9. K30R16-SST UR: 16in. 7.62x39 K16 Style Upper Receiver K30R16-SST UR: 16in. 7.62x39 K16 Style Upper Receiver
    K30R16-SST UR: 16in. 7.62x39 K16 Style Upper Receiver
    K30R16-SSTUR

    K30R16-SST UR: 16in. 7.62x39 K16 Style Upper Receiver

    16" Bull barreled match grade 7.62x39 target/hunting upper. Great for an Olympic Arms or any major brand lower. Learn More
    $399.00
  10. GSG2-68UR-Sale: Gamestalker Upper Receiver Closeout GSG2-68UR-Sale: Gamestalker Upper Receiver Closeout
    GSG2-68UR-Sale: Gamestalker Upper Receiver Closeout
    GSG2-68UR-Sale

    GSG2-68UR-Sale: Gamestalker Upper Receiver Closeout

    GSG2 6.8 Remington Closeout Gamestalker Upper Receiver, Black/SS Learn More
    $675.00
  11. GSG2-556UR-Sale: Gamestalker Upper Receiver Closeout GSG2-556UR-Sale: Gamestalker Upper Receiver Closeout
  12. K8T-UR-SALE: Tactical Targetmatch Upper Receiver Closeout K8T-UR-SALE: Tactical Targetmatch Upper Receiver Closeout
  13. K3B-CAR Upper LIMITED SALE K3B-CAR Upper LIMITED SALE
    K3B-CAR Upper LIMITED SALE
    K3B-CARUR-SALE

    K3B-CAR Upper LIMITED SALE

    This K3B variant has an 11.5" barrel with a permanently attached 5.5" flash suppressor. Available in 5.56 NATO Learn More
    $399.00
  14. K24P-10-UR-FT: 10mm 11.5" AR15 Pistol/SBR upper K24P-10-UR-FT: 10mm 11.5" AR15 Pistol/SBR upper
  15. GSG2UR: Gamestalker Gen-II Upper Receiver GSG2UR: Gamestalker Gen-II Upper Receiver
  16. K24P-9-UR-OR: 9mm 11.5" AR15 Pistol/SBR upper K24P-9-UR-OR: 9mm 11.5" AR15 Pistol/SBR upper
    K24P-9-UR-OR: 9mm 11.5" AR15 Pistol/SBR upper
    K24P-9-ur-or

    K24P-9-UR-OR: 9mm 11.5" AR15 Pistol/SBR upper

    9mm 11.5" Optics ready AR15 pistol or SBR upper Learn More
    $767.00
  17. K24P-9-UR: 9MM 11.5" AR15 Pistol/SBR upper K24P-9-UR: 9MM 11.5" AR15 Pistol/SBR upper
  18. K45UR-FT: 45 ACP Flat-top Upper Receiver, 16" K45UR-FT: 45 ACP Flat-top Upper Receiver, 16"
    K45UR-FT: 45 ACP Flat-top Upper Receiver, 16"
    K45UR-FT

    K45UR-FT: 45 ACP Flat-top Upper Receiver, 16"

    Complete upper receiver assembly chambered in 45 ACP and includes one 18 round polymer magazine. Standard with Picatinny Falt-top upper receiver.

    Upper is 100% complete with bolt carrier assembly and charging handle. Ready to drop on any standard AR15 lower receiver. Simply attach the upper and swap out to the 45 ACP magazine, and you are ready to shoot. Swap back and forth between calibers in as little as 15 seconds!

    This caliber conversion does not require the changing of hammer, trigger, buffers or buffer spring. No need to add in a magazine well adapter or mag well plug either. Designed to work with any standard , unmodified AR15 lower with A2 or collapsible stocks.

    Other pistol calibers available: 9mm, 10mm and 40 S&W.

    Don't forget Extra magazines and/or spare pistol-cal parts.

    Learn More
  19. 24" .223 WSSM Upper Conversion Unit 24" .223 WSSM Upper Conversion Unit
    24" .223 WSSM Upper Conversion Unit
    K8MAGUR223

    24" .223 WSSM Upper Conversion Unit

    Upper conversion unit for your complete AR-15 lower receiver designed for .223 Winchester Super Short Magnum. Learn More
    $895.70
  20. K10UR 10mm Upper Receiver, 16" bbl. K10UR 10mm Upper Receiver, 16" bbl.
    K10UR 10mm Upper Receiver, 16" bbl.
    K10UR

    K10UR 10mm Upper Receiver, 16" bbl.

    Complete upper receiver assembly manufactured in 10 mm caliber. Includes one 18 round polymer magazine. Standard with A2 upper receiver, but available with an optional picatinny flat-top upper (includes standard military A-frame front sight base), or Optics Ready flat-top by optioning in a picatinny gas block.

    Uppers are 100% complete and fully assembled with complete bolt-carrier assembly and forged charging handle. Ready to drop on any standard AR15 lower reciever. Simply attach the upper and swap out to the 10mm magazine, and you are ready to shoot. Swap back and forth between calibers in as little as 10 seconds!

    This caliber conversion DOES NOT require the changing of hammers, triggers, buffers or buffer springs. No need to add in a magazine well block adapter, additional ejector assembly or mag well plug either. Designed to work with any standard , unmodified AR15 lower with A2 or collapsible stocks.

    Other pistol calibers available: 9mm, 45 ACP and 40 S&W.

    Learn More
    $721.50

Items 21 to 40 of 57 total

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