This MP5 Is Chambered In 5.56? The HK53
This video from Garand Thumb explores the unusual HK53, a firearm chambered in 5.56mm that is based on the MP5 platform. The title itself highlights the interesting caliber choice for this rifle. The description includes standard sponsor plugs for data protection services (Aura), a Patreon page, and mentions of Onward Research, SDI School, and Xidax Computers, along with social media links. The content appears to be a focused review or discussion of this specific firearm, likely aimed at firearm enthusiasts interested in niche or uncommon variants.










