ometimes it is important to understand where you have been to know where you are and where you are going. Features on modern AR15-platform rifles like adjustable gas blocks, drop-in triggers, adjustable stocks, and M-Lock handguards evolved over time. The first "black rifle," the XM16E1, is where the modern AR15 platform came from, and the Brownells XBRN16E1 (new this year) brings you back to the early 1960s when new words were added to our lexicon: M16, grunt, napalm, and Vietnam. It brings you back to the first Black Rifle. At SHOT 2018 Brownells introduced the Retro Rifle series, which are newly manufactured replicas of famous Eugene Stoner AR rifle designs. There are six rifles in the series and the XBRN16E1 is Brownells version of the first true M16-style rifle, called the XM16E1 by the U.S. before the platform was officially designated as the M16.