Understanding the Locking Piece in the MP5SD: Why HK Originally Engineered It with a 120-Degree Design
Among the many engineering details that make the MP5 family legendary, one of the least understood—but most important—components is the locking piece. While casual shooters may never think about it, this small, angled component plays a major role in how the MP5SD operates, cycles, and manages recoil. For the MP5SD specifically, the locking piece is […]
