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.

WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. You must be 18+ years old to shop and or purchase on our website and 21+ to purchase Ammunition/Firearms. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. There are NO returns or exchanges on armor, firearms, ammunition, PPE equipment. Ammo ships UPS ground to the lower 48 states.
We reserve the right to fix any critical errors.