Noveske N4 Infidel 13.7 5.56 Complete Upper Receiver 15 M-LOK Black - 03002553

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Noveske N4 Infidel Complete Upper Receiver 13.7" 5.56 NATO 16" OAL P&W 03002553 UPC: 840906135723

Product Description

The Noveske N4 Infidel 13.7" Complete Upper Receiver is a premium-grade AR-15 barrel assembly designed to deliver match-grade accuracy, duty-grade reliability, and optimized dwell time. Built around a 13.7-inch stainless steel barrel with a 1:7 twist rate, this upper features a pin-and-weld Pig Pen flash hider that brings the overall barrel length to a compliant 16 inches, avoiding NFA Short-Barreled Rifle (SBR) classification while preserving a compact front-end profile. The barrel is precision-machined, air-gauged, and features Noveske's proprietary Infidel profile paired with an intermediate gas system for smooth cycling and reduced recoil impulse.

Encasing the barrel assembly is a 15-inch Noveske NSR M-LOK free-float handguard, providing an continuous top Picatinny rail and M-LOK mounting slots at 3, 6, and 9 o'clock for lights, lasers, and vertical grips. The upper receiver is forged from 7075-T6 aluminum, finished in a durable black Cerakote, and comes pre-assembled with a Noveske Black Love Handle ambidextrous charging handle and a reliable, black-nitride-finished M16-profile bolt carrier group (BCG). Every component is tolerance-tested to ensure seamless integration into any standard Mil-Spec AR-15 lower receiver.

Engineered for hard-use tactical applications and performance shooting, the N4 Infidel upper eliminates front-end weight without sacrificing barrel rigidity. The stainless steel barrel material offers superior thermal stability during high-volume strings of fire, ensuring minimal point-of-impact shift. Combined with the gas efficiency of the intermediate gas system, this upper provides shooters with a flatter-shooting, softer-recoiling platform engineered for immediate deployment.

Armorer Bench Notes & Real-World Staging Guidance:

Fitment Matrix: Fits standard Mil-Spec AR-15 / M4 lower receivers (requires standard carbine or H-series buffer system setup).

1. Verify the host lower receiver is completely unloaded, magazine removed, and clear of live ammunition.
2. Inspect lower receiver pivot and takedown pins for proper detent tension and clean alignment holes.
3. Align the front pivot pin lug of the Noveske upper receiver with the lower receiver pivot pin hole; push the pivot pin fully through.
4. Pivot upper receiver down onto lower receiver until flush against the lower buffer tube tower.
5. Push the rear takedown pin fully through to lock upper and lower receivers together; check for excessive receiver wobble.
6. Perform a manual function check: rack the charging handle back, verify proper BCG movement, release, verify bolt locks into battery, and test fire-control group safety/sear engagement.
7. Mount desired optics/accessories onto the NSR M-LOK handguard using torque specifications provided by the accessory manufacturer (typically 15–20 in-lbs for M-LOK screws).

Key Features

• 13.7" Stainless Steel Barrel: Match-grade stainless steel barrel with Infidel contour for optimal heat dissipation and precision.
• Pinned & Welded Pig Pen Flash Hider: Permanently attached muzzle device achieves 16" total barrel length (non-NFA).
• 15" NSR M-LOK Handguard: Ultra-slim free-float handguard providing continuous top rail space and multi-angle mounting points.
• 7075-T6 Forged Upper Receiver: Mil-spec hardcoat anodized with a protective black Cerakote outer finish.
• Intermediate Gas System: Tuned gas port configuration for reduced felt recoil and smooth cyclic rate.
• Noveske Love Handle Charging Handle: Ambidextrous charging handle for rapid, reliable manual manipulation.
• Complete Factory BCG Included: Fully assembled with a nitrided M16-profile bolt carrier group ready for drop-in use.

Product Specifications

• Brand: Noveske Rifleworks
• Model/Series: N4 Infidel Complete Upper Receiver
• MPN: 03002553
• SKU: 03002553
• UPC: 840906135723
• Platform Fitment: AR-15
• Caliber: 5.56x45mm NATO
• Barrel Length: 13.7 inches (16" Overall Length with P&W Muzzle Device)
• Barrel Material: Stainless Steel
• Thread Pitch: 1/2x28 tpi
• Muzzle Device: Noveske Pig Pen Flash Hider (Pinned and Welded)
• Handguard: 15" NSR M-LOK Rail
• Charging Handle: Noveske Love Handle Ambidextrous
• Finish: Cerakote Black
• Country of Origin: USA