Noveske X Irregular Defense CHAINSAW 11.5” Complete Upper Receiver

Irregular Defense CHAINSAW 11.5” Complete Upper Receiver

The Noveske Chainsaw 11.5” Upper Assembly is a high-performance, duty-ready upper, blending precision machining, premium materials, and superior gas system efficiency. Built with Noveske’s Match Chamber, straight-fluted barrel, and NSR-10.75” M-LOK free-floating handguard, this upper ensures exceptional accuracy, recoil management, and long-term durability.

Whether for CQB operations, law enforcement use, or personal defense, this forged 7075-T6 aluminum upper with black anodized coating provides a battle-ready solution with rugged aesthetics and ambidextrous functionality.

Barrel & Gas System

• 11.5” 5.56mm 416R Stainless Barrel – Precision-machined with 1:7 twist for optimal projectile stabilization.
• Hand-Polished Noveske Match Chamber – Ensures tight tolerances and superior accuracy.
• Mid-Length Gas System – Smooth cycling and improved recoil management over carbine-length alternatives.
• Straight Fluted Barrel Profile – Enhanced heat dissipation and weight reduction.
• Pinned Noveske Low-Profile Gas Block – Rock-solid alignment on .750” journal for peak reliability.
• M4 Barrel Extension & Hand-Polished Feed Ramps – Ensures smooth chambering and flawless function.
• CGS SCI-SIX Flash Hider / Suppressor Mount – Versatile muzzle device for signature reduction or suppressor attachment.

Upper Receiver & Internals

• Noveske Chainsaw™ Forged Upper Receiver – 7075-T6 aluminum with extended feed ramps for enhanced reliability.
• Black Hardcoat Type III Anodizing – Superior finish longevity and corrosion resistance.
• Black Nitride Noveske Forward Assist – Toughened for extended service life.
• Noveske FDE Love Handle Ambidextrous Charging Handle – Optimized for fast, intuitive manipulation.
• Anti-Rotation Interface with Handguard – Ensures secure fitment with minimal movement.
• Phosphate-Coated Bolt Carrier Group (Full-Auto Rated) –
  • Chrome-lined carrier bore & key
  • Properly staked Grade 8 gas key bolts
  • Carpenter 158 heat-treated steel bolt (MPI tested)

Handguard & Mounting System

• 4th Generation NSR-10.75” M-LOK Free Floating Handguard –
  • M-LOK attachment points every 45 degrees for streamlined accessory mounting
  • Picatinny 1913 top rail for optics, iron sights, and lasers
• Lightweight American-Made Steel Barrel Nut – Improves rigidity and strength.
• Optimized Suppressor Clearance – 10.75” handguard allows precise fitment with an 11.5” barrel.