H&R Retro M16A1 5.56 NATO Rifle, 20" Pencil Barrel, Black The Harrington & Richardson Retro M16A1 is a complete 5.56 NATO rifle with a 20-inch pencil-profile barrel and black finish. Its M16A1-style upper, triangular handguards, and A1-style grip give the rifle a distinct retro configuration. Those are functional parts of the complete firearm, alongside the H&R Retro Trigger and the rifle-length gas system. The barrel is made from 4150 chrome moly vanadium steel with a parkerized exterior and chrome lining. A pencil profile describes its slender barrel contour, while the 1:7 twist specification identifies the rifling rate. The forged 7075-T6 receiver and black anodized finish complement the rifle's steel barrel and its coordinated A1-style furniture. Retro Configuration The triangular handguard shape, A1-style grip, and M16A1 upper define the rifle as a coordinated retro configuration. Heat shields are included in the handguards, and the rifle-length gas system is specified for the 20-inch barrel assembly. Key Features 20-inch pencil barrel: A slender-profile 5.56 NATO barrel forms the core of the rifle configuration. M16A1-style upper: The upper receiver follows the specified M16A1 pattern. Triangular handguards: M16A1-style handguards include heat shields. A1 grip and muzzle device: The grip and A1-style muzzle device carry the retro pattern through the rifle. H&R Retro Trigger: The complete rifle includes the specified H&R trigger. Specifications Manufacturer: Harrington & Richardson Model: Retro M16A1 Caliber: 5.56 NATO Barrel length: 20 inches Barrel profile: Pencil Barrel steel: 4150 chrome moly vanadium Barrel finish: Parkerized Barrel lining: Chrome Twist rate: 1:7 Gas system: Rifle length Receiver: Forged 7075-T6 Finish: Black anodized Shop the H&R Retro M16A1 black 5.56 NATO rifle with a 20-inch pencil barrel at BattleHawk Armory.