Product Description
The NUBS Duty Upper is built for shooters who demand reliability, durability, and consistent performance in a hard-use 5.56 platform. Featuring a 12.5″ 5.56 barrel with a mid-length gas system, this upper is designed to provide a smooth-shooting, dependable setup for duty use, training, competition, and high-round-count applications.
The gas system is controlled by a Riflespeed adjustable gas block, allowing the rifle to be properly tuned to the shooter’s ammunition and setup. The hand-lapped upper receiver provides a refined fit and consistent alignment, while the Geissele MK16 rail offers a rigid and durable mounting platform for accessories.
The NUBS Duty Upper is equipped with an Unrivaled LSD Hub, Unrivaled Duty Bolt Carrier, and Unrivaled Duty Buffer. The DSI Dual Ejector BCJ provides enhanced extraction and ejection reliability, while the Geissele SCH charging handle provides smooth and positive operation.
The NUBS Duty Upper combines proven components with a purpose-built configuration for shooters looking for a reliable, hard-use upper that can perform across duty, training, and competition applications.
