The .300 AAC Blackout round was designed to fit and function within the standard mil-spec M4—while delivering ballistic performance on par with the 7.62x39mm. With subsonic, supersonic, and barrier-penetrating loads available, 300 BLK is as versatile as it is effective.
If you've decided that it's time to start a 300 BLK build, here's a good place to start. The Anderson® EXT 300 BLK Carbine Upper features a 16" barrel with 1-in-7 twist, a carbine-length gas system, and quality EXT forearm.
PLEASE NOTE: Bolt Carrier Group and Charging Handle are NOT included.
More on Anderson®
If you don't know Anderson Manufacturing®, now is the time to get acquainted…because they make outstanding rifles at fantastic prices, and we'd hate for you to miss out. Unlike other companies, Anderson makes most of their components in-house at their Hebron, Kentucky facility—meaning they can control quality like no other. So while the price says "entry level," the built quality and finish are well beyond.