NBS Premium Series 16″ 5.56 Upper Assembly w/ Rosco Barrel and Geissele MK14 Handguard - 9015

Built on a top tier 7075 forged upper receiver and fitted with the popular 16″ Bloodline Midlength Nitride Barrel from Rosco Manufacturing, this premium barreled upper assembly is both durable and accurate. Over the years we’ve gotten thousands of 5 star reviews on the NBS line of complete uppers, we’re sure that this premium variant will go fast.

About the Handguard

The MK14 is the latest entry to the Geissele line up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK14 Super Modular Rail is an updated version of the proven Geissele Barrel Nut design, not only providing ease of installation but superior rigidity. The long surface contact of the 2.25″ barrel nut interfaces with the receiver creating a platform that can be trusted to be straight and true the entire length of the free float rail. The MK14 is 3d precision machined using 6061-T6 Aluminum due to its strong, rigid and lightweight properties.

Utilizing Magpul’s M-LOK technology in the 3, 6, and 9 o’clock positions allow the end user full customization and modularity of their rifle to securely mount lights, bipods and other firearm accessories. The Geissele MK14 Super Modular rail is finished in a durable and long lasting Type 3 Hardcoat Anodized available in either Black or Geissele’s DDC finish.

Barrel Information

This 16″ Government 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the Rosco touch as well. The longer gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance..

Build Quality 

All NBS uppers are 100% made in the USA assembled by experienced, hard working armorers according to modern best practices. No shortcuts are taken and we guarantee a fit and finish that will satisfy even the most discerning builder.