Sionics Weapon Systems Patrol III XL 5.56 NATO Lightweight Nitride AR-15 Barreled Upper Receiver 15" Rail - 16" with Premium Upper Receiver

Manufactured by Sionics Weapon Systems
Manufactured by Sionics Weapon Systems
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Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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The Sionics Weapon Systems Patrol III XL AR-15 Medium Barreled Upper Receiver features a 16" barrel chambered in 5.56 NATO with a 1:8 twist rate and Mid-Length gas system. The barrel is machined from 41V50 steel, magnetic particle inspected, and features a lightweight profile. The 15" Sionics free-float handguard features M-LOK attachment slots and a full-length Picatinny top rail. The upper receiver is made from 7075-T6 aluminum forgings and hardcoat anodized.

  • Premium-grade upper receiver
  • 16" 5.56 NATO barrel
  • Medium profile
  • 41V50 Chrome Moly Vanadium Steel
  • Mid-Length gas system
  • 15" free float M-LOK handguard
  • 7075-T6 aluminum forged receiver
  • A2 flash hider
  • 8620 M16 BCG

The Premium Upper Receiver features extremely tight machining tolerances. These improved tolerances allow for tighter barrel fit and improved accuracy. Another improvement is the Midnight Type III Class II hardcoat finish. Each receiver is precision cut from 7075-T6 aluminum to provide the optimal balance of weight and strength you can depend on.

A SIONICS Weapon System is a firearm that is more than just built from the ground up by master gunsmiths for professionals in the field. They're more than just an assembly of quality components. Every firearm built by SIONICS has been carefully crafted from the best components available by a single master gunsmith before a second master gunsmith puts it through a 19-point quality inspection and test firing process to ensure that ever SIONICS firearm has been built without compromise.
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Barrel Coating
Barrel ContourLightweight
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandSionics Weapon Systems
Caliber Gauge5.56 NATO
FinishHardcoat Anodized
Handguard15 in M-LOK Rail
Muzzle DeviceA2 Flash Hider
Thread Pattern1/2 X 28
Twist Rate1:8
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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