Noveske Rifleworks N4 OG Complete AR-15 Upper Receiver - 6mm ARC - 12.5" - FDE

The Noveske Rifleworks N4 OG Complete AR-15 Upper Receiver in FDE pairs a 12.5" 416R stainless barrel chambered in 6mm ARC with a mid-length gas system, a fully-featured build ready for any mil-spec lower.

Features:

• 12.5" 416R stainless steel barrel chambered in 6mm ARC, 1:7 twist
• Hand-polished Noveske Match Chamber
• Mid-length gas system, pinned .750" low-profile gas block
• M4 barrel extension with polished feed ramps
• Noveske Pig Pen suppressor-compatible muzzle device
• 10.75" 4th Generation NSR free-float M-LOK handguard
• Flat Dark Earth Cerakote over hardcoat anodizing
• Ambidextrous charging handle

The mid-length gas system on this 12.5" barrel is tuned to give 6mm ARC's cartridge pressure curve enough dwell time for reliable cycling, and the Pig Pen muzzle device gives a direct suppressor mounting path. The 10.75" NSR handguard's full-length Picatinny top rail leaves room for optics and other accessories.

Because this 12.5" barrel measures under 16", this complete upper is intended only for an AR pistol or a legally registered short-barreled rifle — attaching it to a standard rifle lower without the correct configuration violates federal law.

Noveske Rifleworks is an American manufacturer based in Grants Pass, Oregon, with a reputation for building premium AR-platform rifles and components trusted by military, law enforcement, and civilian shooters alike.