The AR15 BAR Barrel Nut and Shims from Aero Precision are a highly-rated product. They are used to install handguards on standard threaded upper receivers. To make sure that this barrel nut and shims fit your forends precisely, they are fitted with the proprietary BAR interface. This system also allows for safe and secure installation.
Like many Aero Precision products, the AR-15 BAR Barrel Nut and Shims are machined from billet aluminum with an anodized finish. It is important to note that in order to install, you must have a standard AR15 armorer’s wrench, as well as an adjustable torque wrench and anti-seize grease.