Nefarious Arms HK416 A5 / G95 Barrel, 14.5", 5.56x45mm NATO

The Nefarious Arms HK416 A5 Barrel is engineered for shooters who demand uncompromising performance, precision, and durability. Proudly made in the USA, this barrel is crafted from premium 4150 Chrome Moly steel, cold-hammer-forged for strength, and chrome-lined to ensure years of reliable accuracy. Finished in black manganese phosphate, it’s built to handle heavy use while maintaining peak performance. Whether you’re upgrading your HK416 or MR223, this barrel delivers the reliability and consistency you can trust.

Our 14.5" HK416 A5–style barrel is precision-machined for builders who want authentic HK geometry. Cut for an M27 bayonet lug and a front sight base, it mates cleanly with HK-pattern components to reproduce the European HK416A5 / G38 / G95 look and function. Gas Block Journal cut for HK A4 Style gas block, not compatible with our NA5 Adjustable Gas Block. 

HK416 A5

G38

G95

Key Features:

• Caliber: 5.56x45mm NATO
• Barrel Length: 14.5"
• Profile: 416 A5 / G38 / G95 Style
• Twist Rate: 1:7
• Barrel Extension: A5
• Gas Block Seat Diameter: 19mm (h6 Tolerance)
• Muzzle Threads: 1/2"x28
• Material: 4150 Chrome Moly 
• Finish: Black Manganese Phosphate 
• Cold-Hammer-Forged for Strength and Consistency
• Chrome-Lined for Years of Accurate Shooting
• Weight: 
• Made in USA 🇺🇸

Compatible With:

• HK 416 A5
  
• HK MR223

Compatible Gas Blocks: 

• HK A4/A5 Gas Block
  

NOT Compatible with the Nefarious Arms NA5 Adjustable Gas Block

Note:

A5 Barrel Extensions are marked "HAUS" due to an error by the barrel extension supplier. The marking is not visible once installed.