Noveske AR-15 NST A3 Flat-Top Upper Assembly 5.56x45mm NATO 1 in 7" Twist 18" Barrel Stainless Steel with NSR-13.5 Free Float Handguard, SJC Titan Brake

Product #: 467414 Noveske #: U-18NST-556

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Product Information

This Noveske Shooting Team (NST) Complete AR-15 Upper Assembly is designed to excel in Multi-Gun and 3-Gun Competition, with each component being selected specifically to enhance the rifle's performance, balance and reliability under demanding conditions. The NST upper comes equipped with one of Noveske's legendary stainless steel match barrels featuring their exclusive 5.56 Match Mod 0 chamber for outstanding accuracy with both 5.56x45mm NATO and 223 Remington ammunition. This barrel is turned down to a lightweight contour for faster handling, and comes with improved polygonal 1 in 7" twist rifling, M4 feed ramps and a non-glare, bead-blasted finish. The upper's intermediate length gas system is slightly longer than mid-length and slightly shorter than rifle length, resulting in a smooth recoil impulse upon firing while also maintaining an optimal gas dwell time to ensure reliable functioning. When coupled with the highly effective SJC Titan Compensator, the intermediate gas system and comp work together symbiotically to significantly reduce perceived recoil and muzzle rise, allowing for the rapid, accurate shooting style employed by today's top 3-Gun competitors. Additional features include a forged charging handle, a pinned low profile gas block and a shot peened, MP-tested bolt housed within a Mil-Spec bolt carrier.

This NST upper includes a 13.5" long Noveske NSR-13.5 handguard with the proprietary KeyMod rail system and, with an outside diameter of only 1.48" (without accessories attached), is one of the slimmest, lightest, customizable handguards available for the AR-15 platform. The NSR free floats the barrel for greater accuracy potential and provides a full length, continuous top rail for the addition of optics and/or accessories (additional add-on rail sections sold separately). KeyMod accessories are quick and easy to install along the handguard's length, and don't require that the NSR be removed from the upper in order to attach or detach them. All KeyMod system accessories use captured backing plates that are inserted into an unused key-slot hole and then tightened into place via an allen wrench, eliminating the tedious and frustrating procedure of fishing separate backer plates down the interior of a handguard and securing them with loose fasteners as required by most competing modular forearm designs.

  • Upper Receiver: A3 Flat-Top
  • Barrel Length: 18"
  • Barrel Contour: Lightweight
  • Barrel Material: 416R Stainless Steel
  • Muzzle Thread Pattern: 1/2"-28
  • Chrome Lined: No
  • Barrel Finish: Bead-Blasted Satin Gray
  • Twist Rate: 1 in 7" Polygonal
  • Chamber: 5.56 Match Mod O
  • Bolt Carrier: Mil-Spec
  • M4 Feed Ramps: Yes
  • Muzzle Device: SJC Titan Compensator
  • Gas System Length: Intermediate (1.5" Shorter than Rifle Length)
  • Gas Block Diameter: 0.750"
  • Handguard: NSR-13.5, Free Float
  • Sights: None
  • Extras: Forged Charging Handle
  • Weight: 4 lbs, 7.7 oz

Note: All Noveske 5.56mm uppers are test fired with Black Hills ammunition at their facility before shipment.
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