At Starline, we pride ourselves on producing the highest quality brass case available. With a production process focused on quality not quantity. Starline makes the finest brass and has for more than 45 years. It is our unique manufacturing process and the commitment of our team of employees that distinguish us from the competition.
 
The .300 Blackout is based off of a shortened 5.56x45mm case that is necked to .30 caliber. For AR-15 platform rifles and pistols it only requires changing the barrel to go from 5.56 to .300 Blackout. The Blackout's main purpose is to be used at subsonic velocities in suppressed firearms.
 
Many bolt action and single shot rifles are now being produced in this caliber as well.
 
made in USA.