Understanding Roller-Delayed Blowback: The Physics Behind the MP5 and MP5SD
The HK MP5 family is famous for its smooth recoil, controllability, and legendary reliability. But what truly sets it apart from conventional submachine guns is its operating system: roller-delayed blowback. While many shooters have heard the term, few understand how it works—or why it delivers such a unique shooting experience. This companion post breaks down the physics of […]
