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

Davidson Defense Last Impact 16" Carbine-Gas 5.56 NATO AR-15 Complete Upper Assembly delivers premium barrel construction and tactical versatility for AR-15 platforms. Constructed with 16-inch cold hammer forged 4150 CrMoV steel barrel featuring M4 profile and phosphate finish providing superior durability and accuracy, 1:7 twist rate optimizing bullet stabilization for 5.56 NATO and heavier projectiles, carbine-length gas system ensuring reliable cycling, 7075-T6 aluminum upper receiver with M4 feed ramps for smooth feeding, Trinity Force 12-inch free-float KeyMod handguard enabling extensive customization while maintaining lightweight profile, low-profile gas block, standard A2 birdcage flash hider, and mil-spec charging handle—perfect for AR-15 builds, tactical rifle configurations, precision shooting applications, and shooters seeking quality complete upper assemblies with cold hammer forged barrel construction complementing AR-15 platforms.

Key Specifications:

• Model: Davidson Defense Last Impact 16" Complete Upper Assembly
• Platform: AR-15 standard compatibility
• Barrel Length: 16 inches M4 profile
• Barrel Material: 4150 CrMoV steel cold hammer forged
• Barrel Finish: Phosphate corrosion-resistant coating
• Twist Rate: 1:7 optimal stabilization
• Gas System: Carbine-length reliable cycling
• Caliber: 5.56 NATO/.223 Remington
• Upper Receiver: 7075-T6 aluminum with M4 feed ramps
• Handguard: Trinity Force 12" free-float KeyMod
• Handguard Length: 12 inches extended rail coverage
• Gas Block: Low-profile design
• Charging Handle: Mil-spec M4 pattern
• Muzzle Device: A2 birdcage flash hider standard
• Color: Black tactical finish

Perfect For:

• AR-15 tactical rifle configurations
• Custom builds requiring quality uppers
• Precision shooting applications with CHF barrels
• Mid-length rail tactical setups
• Gunsmiths seeking complete upper assemblies
• Shooters prioritizing cold hammer forged quality

Cold Hammer Forged 4150 CrMoV Barrel: The 16-inch barrel features cold hammer forged construction from 4150 Chrome Moly Vanadium steel, providing superior durability, accuracy, and barrel life compared to button-rifled barrels. The cold hammer forging process creates denser steel structure with superior grain alignment, resulting in enhanced strength and longer service life under high-round-count applications. The M4 profile barrel provides government-standard contour balancing weight and heat dissipation for reliable performance. The phosphate finish provides corrosion resistance and wear protection, while the 1:7 twist rate optimizes bullet stabilization for 5.56 NATO ammunition including heavier projectiles from 55 to 77 grains for maximum versatility.

7075-T6 Upper with Trinity Force KeyMod Handguard: The upper receiver is constructed from 7075-T6 aluminum with M4 feed ramps for enhanced feeding reliability with various ammunition types including hollow-point and specialty rounds. The M4 feed ramps provide smoother cartridge transition from magazine to chamber, reducing feeding malfunctions. The Trinity Force 12-inch free-float KeyMod handguard allows extensive customization with KeyMod-compatible accessories including lights, lasers, foregrips, and bipods while maintaining lightweight profile. The 12-inch length provides substantial rail coverage for accessory mounting and forward hand placement, working well with the 16-inch barrel for nearly full-length coverage.

Low-Profile Gas Block with Mil-Spec Components: The low-profile gas block maintains sleek profile under the free-float handguard for clean appearance and protected gas system operation. The carbine-length gas system provides reliable cycling with standard 5.56 NATO ammunition while maintaining the proven reliability of the most common AR-15 gas configuration. The mil-spec charging handle provides reliable charging operation with standard latch design for straightforward manipulation. The standard A2 birdcage flash hider reduces muzzle flash for improved shooter visibility during low-light shooting while providing 1/2x28 threading for future muzzle device upgrades. The Davidson Defense Last Impact 16" Carbine-Gas Complete Upper Assembly is designed for shooters and gunsmiths seeking premium AR-15 upper solutions—combining cold hammer forged 4150 CrMoV barrel with M4 profile, 7075-T6 upper receiver with M4 feed ramps, Trinity Force 12" free-float KeyMod handguard, carbine-length gas system, and standard A2 flash hider in a complete package that delivers superior barrel quality, tactical versatility, and professional performance ideal for AR-15 builds requiring precision and reliability.