Next Level NLX556 GFK Complete Upper Whether you're ready to finish your build, add capability to an existing rifle, or upgrade your AR15 rifle, with the Next Level Armament NLX556 GFK complete upper, we have you covered! Next Level manufactures all our products in house with American made materials. From our 7015 aluminum standard to our precision Aerospace machining, our quality speaks for itself. Built with the best parts on the market, our complete upper comes with all the upgrades standard. Why pay less for inferior parts and pay more to upgrade later? Your upper is available in 5.56 with a 16', 11.5', or 7.5' barrel, or in 300 Blackout with 7.5' or 10.5' barrel. ** Uppers are built to order, so please allow 1-2 weeks for delivery** The NLX556 upper includes the following parts: NLX556 forged upper receiver Roscoe Bloodline barrel NLX556 BCG w/ DLC NLX556 Ambidextrous Charge Handle NLA Billet low profile gas block NLA Mlok handguard