The Retro-Arms Light Support Weapon Upper delivers rugged performance with a heavy A4 barrel for sustained fire capability. Outfitted with a Light Support Weapon (LSW) handguard and a picatinny rail on the underside of the handguard, this upper provides a stable, modular platform for mounting accessories. Designed for durability and reliability, it offers enhanced heat management and versatility for mission-ready applications. FeaturesHeavy A4 Barrel Upper for solid strength and long-lasting accuracy.Withstands high-round-count training without performance loss.Perfect for drills, repeat fire, and consistent shooting.