Faxon Firearms ARAK-21 Complete Upper 16" 5.56 NATO Tungsten Cerakote URSSB556SSW

SKU: FLX-182007

Regular price $1,040.98
Sale price $1,040.98 Regular price $1,160.60
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Product Description

The Faxon Firearms ARAK-21 16" 5.56 NATO Complete Upper in Tungsten Cerakote is a Sports South exclusive, limited-production variant of Faxon's patented piston-driven upper receiver system. Machined from a billet monolithic aluminum upper receiver and forearm housing, this complete upper drops onto any mil-spec AR-15 lower using standard takedown and pivot pins - no permanent modifications required. It replaces the conventional AR direct-impingement gas system entirely with a patented long-stroke piston and dual reciprocating operating rods (U.S. Patent No. 9,032,860 B2), eliminating the need for a buffer tube or buffer spring from the lower receiver. The 16" QPQ nitride-finished barrel is chambered in 5.56 NATO/.223 Remington with a 1:8 twist rate and ships fitted with a Faxon MuzzLok Ported Brake on 1/2x28 threads. The upper and lower handguard plate are finished in a warm, medium-gray Tungsten Cerakote - an industry-leading ceramic coating offering superior corrosion, chemical, and abrasion resistance - available exclusively through Sports South authorized dealers for a limited production run.

Product Highlights

  • Patented Long-Stroke Piston System: Dual reciprocating operating rods run alongside the barrel inside the monolithic upper, keeping gas out of the action for a cleaner, more reliable cycle - especially suppressed or in adverse conditions (U.S. Patent No. 9,032,860 B2).
  • No Buffer Tube Required: The self-contained recoil system lives entirely within the upper receiver, freeing the lower for folding stocks, side-folders, or PDW braces. The rifle fires and cycles with the stock fully folded.
  • Tool-Less Caliber Conversion: The barrel assembly unit (BAU) integrates the barrel, trunnion, adjustable gas system, and piston into a single drop-in module - swap from 5.56 NATO to 7.62x39mm in the field with no tools, no armorer, and no headspace adjustment required (conversion kits sold separately).
  • Fully Ambidextrous Design: Features a tool-less reversible non-reciprocating forward charging handle, a reversible bolt with dual ejection ports, and compatibility with ambidextrous AR-15 lower controls for seamless left- or right-handed operation.
  • Exclusive Tungsten Cerakote Finish: Limited-production Sports South exclusive Tungsten Cerakote on the upper receiver and lower handguard plate delivers enhanced durability and a distinctive warm medium-gray aesthetic not available in the standard black nitride configuration.

Specs

  • Brand: Faxon Firearms
  • MPN: URSSB556SSW
  • UPC: 816341029422
  • Caliber: 5.56 NATO / .223 Remington
  • Barrel Length: 16"
  • Twist Rate: 1:8
  • Muzzle Thread: 1/2x28
  • Muzzle Device: Faxon MuzzLok Ported Brake
  • Operating System: Patented long-stroke gas piston with dual reciprocating operating rods
  • Gas System: Detented 5-position gas regulator (reduced, normal, adverse, cut-off, disassembly) - adjustable with a cartridge tip
  • Charging Handle: Non-reciprocating forward charging handle (tool-less reversible, left or right side)
  • Ejection: Dual ejection ports (reversible bolt for left- or right-side ejection)
  • Bolt: 8-lug star pattern (AR-15 inspired, enhanced geometry)
  • Barrel Finish: QPQ Nitride
  • Carrier Rails: Hardened QPQ steel (prevents steel-on-aluminum wear)
  • Receiver Construction: Billet monolithic upper receiver and forearm housing (aluminum)
  • Top Rail: Uninterrupted MIL-STD-1913 Picatinny
  • Buffer Tube Required: No - self-contained recoil system; fires and cycles with stock folded
  • Finish (Upper and Handguard Plate): Tungsten Cerakote (Sports South Exclusive)
  • Caliber Convertible: Yes - 5.56 NATO and 7.62x39mm (BAUs and conversion kits sold separately)
  • AR-15 Lower Compatible: Yes - any mil-spec AR-15 lower with standard takedown/pivot pins
  • Weight: 8.5 lbs
  • Length: 36"
  • Width: 7"
  • Height: 4.5"
  • Patents: U.S. Patent No. 9,032,860 B2 (utility); USD708,693 S (design)
  • Distribution: Sports South Exclusive - Limited Production
  • Warranty: Faxon Lifetime Guarantee
  • Country of Manufacture: USA

Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.

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