https://www.iwa.info/en/ausstellerprodukte/iwa23/product-10322404/300-blackout

Magtech® First Defense™ 300 Blackout is the ultimate 30 caliber solution for the AR platform, providing superior ballistics in a lightweight and low recoiling operational package.
There are no required changes to the rifle except for the upper receiver. It retains the normal 30 round capacity of STANAG magazines, and does not require a new bolt.

World leader in ammunition for portable weapons and one of the main suppliers to NATO, CBC is the premier Defense brand in the small caliber segment. CBC products are used globally and contribute to the protection and security of millions of people.

CBC was created in Brazil in 1926 and holds the status of Strategic Defense Company, being the primary supplier to the local military and law enforcement sectors. It serves as the headquarters for CBC Global Ammunition, the holding for a group of companies internationally active in the ammunition sector: CBC Brazil, Magtech Ammunition USA, MEN Germany and Sellier & Bellot Czech Republic.

This strategic alliance forms one of the largest ammunition corporations in the world, with a combined experience of more than 300 years in the manufacturing of small and medium calibers.

The comprehensive range of CBC products is exported to over 100 countries, meeting the needs of Military, Law Enforcement and Commercial markets.

Together, CBC Global operations employ 3,500 skilled workers and produce over 1.5 billion rounds of ammunition per year.