Davidson Defense Last Impact 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Rifle Assembled Upper Receiver

Davidson Defense Last Impact 16" Carbine-Gas 5.56 NATO AR-15 Upper Receiver delivers precision engineering and tactical versatility for AR-15 platforms. Constructed with 16-inch 4150 CrMoV steel barrel featuring phosphate finish providing durability and corrosion resistance, 1:7 twist rate optimizing stabilization for various bullet weights from 55 to 77 grains, carbine-length gas system with micro low-profile gas block ensuring consistent cycling, free-float KeyMod handguard offering lightweight design for versatile accessory attachment while minimizing barrel interference, 7075-T6 aluminum upper receiver with Type III anodizing and M4 feed ramps, 1/2x28 TPI GI birdcage flash hider, and sleek black finish—perfect for AR-15 tactical builds, custom rifle configurations, precision shooting applications, and shooters seeking quality upper receivers with proven carbine-length gas systems complementing AR-15 lower receivers.

Key Specifications:

• Model: Davidson Defense Last Impact 16" Carbine-Gas Upper Receiver
• Platform: AR-15 standard compatibility
• Barrel Length: 16 inches carbine profile
• Barrel Material: 4150 CrMoV steel construction
• Barrel Finish: Phosphate corrosion-resistant coating
• Twist Rate: 1:7 optimal stabilization
• Gas System: Carbine-length reliable cycling
• Gas Block: Micro low-profile design
• Caliber: 5.56 NATO/.223 Remington
• Upper Receiver: 7075-T6 aluminum with M4 feed ramps
• Upper Finish: Type III hard anodized
• Handguard: Free-float KeyMod lightweight design
• Muzzle Device: GI birdcage flash hider 1/2x28 TPI
• Threading: 1/2x28 TPI standard
• Color: Black tactical finish

Perfect For:

• AR-15 tactical rifle builds and configurations
• Custom rifle builds requiring quality uppers
• Precision shooting with carbine-length systems
• Versatile accessory mounting applications
• Gunsmiths seeking reliable upper receivers
• Shooters prioritizing proven gas system design

4150 CrMoV Barrel with Carbine-Length Gas System: The 16-inch barrel is crafted from 4150 Chrome Moly Vanadium steel, providing durability and accuracy for demanding applications while meeting legal barrel length requirements. The phosphate finish ensures resistance to corrosion and wear for extended barrel life in various environmental conditions. The 1:7 twist rate provides optimal stabilization for a variety of bullet weights from lightweight 55-grain to heavier 77-grain projectiles, ensuring versatility across ammunition types for tactical, competition, and hunting applications. The carbine-length gas system with micro low-profile gas block ensures consistent cycling with standard 5.56 NATO ammunition while maintaining the proven reliability of the most common AR-15 gas configuration.

7075-T6 Aluminum Upper with Free-Float KeyMod Handguard: Constructed from 7075-T6 aluminum and anodized with Type III hard anodizing for added toughness, the upper receiver provides superior strength and corrosion protection while maintaining lightweight characteristics. The upper receiver includes M4 feed ramps for enhanced feeding reliability with various ammunition types including hollow-point and specialty rounds, providing smoother cartridge transition from magazine to chamber. The free-float KeyMod handguard offers lightweight design for versatile accessory attachment using KeyMod-compatible mounts while minimizing barrel interference that can affect accuracy. The free-float design eliminates handguard contact with the barrel for improved precision potential.

Micro Low-Profile Gas Block with GI Flash Hider: The micro low-profile gas block maintains sleek profile under the free-float handguard for clean appearance and protected gas system operation. This gas block design ensures consistent gas port alignment for reliable cycling across various ammunition loads and environmental conditions. The 1/2x28 TPI GI birdcage flash hider reduces muzzle flash for improved shooter visibility during low-light shooting while providing standard threading for future muzzle device upgrades including compensators, brakes, or suppressors. The sleek black finish balances functionality and aesthetics for professional appearance. The Davidson Defense Last Impact 16" Carbine-Gas Upper Receiver is designed for shooters and gunsmiths seeking quality AR-15 upper solutions—combining 4150 CrMoV barrel with phosphate finish, carbine-length gas system with micro low-profile gas block, 7075-T6 aluminum upper receiver with M4 feed ramps, free-float KeyMod handguard, and GI birdcage flash hider in a package that delivers precision engineering, tactical versatility, and reliable performance ideal for AR-15 builds requiring proven carbine-length systems and accessory mounting capability.