Spring Mount and Cup Sport Mod

The Spring Mount and Cup Sport Mod by BSB Manufacturing is a precision mounting solution designed for tactical shooters and law enforcement professionals who demand reliable optic or accessory attachment systems. This modular cup-and-spring assembly integrates seamlessly into AR-platform upper receivers and provides a secure, repeatable mounting interface that maintains zero under extended field use. Whether outfitting a duty rifle, competition platform, or training system, this spring mount delivers the mechanical consistency that matters when accuracy counts.

The spring-tensioned cup design accommodates standard mil-spec picatinny accessory rails and distributes clamping force evenly across the mounting surface, reducing stress concentration and preventing rail deformation—a critical consideration for long-term zero retention. The Sport Mod variant is engineered with tight tolerances and optimized spring rates that eliminate wobble while remaining easy to install or remove without specialized tools. BSB Manufacturing's focus on precision machining ensures repeatable engagement and positive indexing, allowing shooters to swap optics or accessories with confidence that their ballistic zero will track identically upon remounting.

This mounting system is ideal for shooters running variable-power optics, red dots, or auxiliary night-vision systems on combat carbines or precision rifles where dependable attachment translates to mission readiness. The Spring Mount and Cup Sport Mod is compatible with AR-15, AR-10, and standard AR-platform uppers, making it a versatile choice for various applications. Its tool-free installation means that users can quickly and easily mount or dismount their optics without the need for modifications to their receivers.