8ar

8ar refers to a specific variant of the AR-15 platform rifle. The designation "8ar" is not a standard manufacturer's model name but rather a community or informal identifier often used to describe rifles chambered in .300 AAC Blackout, also known as 300BLK. This caliber is popular for its versatility, suitable for both suppressed and unsuppressed shooting, and its effectiveness in short-barreled rifle configurations. Rifles designated as "8ar" typically feature a barrel optimized for the 300BLK cartridge, often with a shorter length, and may include other modifications common to AR-15 platforms such as adjustable stocks, different handguards, and optic mounts. The .300 AAC Blackout cartridge itself was developed to provide a subsonic round that functions reliably in an AR-15 platform, as well as a supersonic round with comparable ballistic performance to the 7.62x39mm. The "8ar" designation serves as a quick way for enthusiasts to identify an AR-15 configured for this particular caliber.