FN USA FN15 Military Collector Series M16A4 Complete Upper Receiver Assembly

Description

Product Overview

Own a piece of firearm history from FN USA, makers of battle-proven firearms. This FN15 Military Collector Series M16A4 complete upper receiver assembly is an authentic reproduction built to strict FN and U.S. military specifications. It features a chrome-lined 20 in 5.56x45mm NATO barrel with a 1:7 RH twist, a rifle-length direct impingement gas system, and an M16-style MIL-SPEC bolt carrier group with an HPT/MPI-tested Carpenter 158 steel bolt. The assembly is finished with a Knight’s Armament M5 RAS quad-rail system and A2-style iron sights, making it a strong match for any M16A4-pattern build.

Key Features

• 20 in chrome-lined 5.56x45mm NATO barrel with 1:7 RH twist for reliable performance across common bullet weights
• Rifle-length direct impingement gas system for authentic M16A4-pattern operation
• Complete M16-style MIL-SPEC bolt carrier group with an HPT/MPI-tested Carpenter 158 steel bolt
• Knight’s Armament M5 RAS quad-rail with adapter and rail covers for a classic, modular mounting platform
• A2-style front sight and adjustable rear sight for accurate iron-sight use

Build with confidence using an authentic, specification-driven FN USA M16A4 complete upper receiver assembly.