Description
The Faxon Ascent 5.56 NATO 10.5-inch Complete Upper Receiver is designed for compact AR-15 builds that demand reliability, lightweight handling, and dependable performance. Built as part of Faxon’s Ascent line, this upper assembly offers quality components and precision manufacturing for shooters looking to build or upgrade a high-performance AR platform.
The 10.5-inch barrel is chambered in 5.56 NATO, allowing safe use with both 5.56 NATO and .223 Remington ammunition. A versatile 1:8 twist rate stabilizes a wide range of bullet weights commonly used in defensive, training, and range ammunition. The carbine-length gas system supports reliable cycling and consistent operation in shorter barrel configurations.
Faxon’s Ascent series focuses on delivering a balanced combination of durability, accuracy, and reduced weight. This complete upper receiver is well suited for AR pistol builds, short-barreled rifle configurations, and compact defensive rifle setups where maneuverability and performance are key.
Quick Highlights:
• Complete AR-15 upper receiver assembly chambered in 5.56 NATO
• Compact 10.5-inch barrel ideal for AR pistol and SBR builds
• 1:8 twist rate stabilizes a wide range of bullet weights
• Carbine-length gas system for reliable cycling
• Lightweight Ascent series design
• Durable black finish for long-term reliability
Use Cases & Applications:
• AR-15 pistol builds
• Short-barreled rifle (SBR) configurations
• Compact defensive rifle platforms
• Custom AR-15 builds and upgrades
• Range shooting and training
Technical Details:
• Manufacturer: Faxon Firearms
• Series: Ascent
• Platform Compatibility: AR-15
• Product Type: Complete Upper Receiver
• Caliber: 5.56 NATO / .223 Remington
• Barrel Length: 10.5 Inches
• Twist Rate: 1:8
• Gas System: Carbine Length
• Finish: Black





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