Spring Cup Mid Height 4in Tall

The Spring Cup Mid Height 4in Tall is a precision-engineered modular component designed for shooters who demand repeatable, secure weapon system assembly. Built to exacting standards by WEHRS MACHINE, this mid-height cup serves as a critical interface in AR-platform configurations, providing the structural foundation necessary for consistent barrel extension engagement. Whether you're running a duty rifle, precision build, or competition platform, this component bridges the gap between reliability and performance in demanding operational environments.

Engineered to precise tolerances, the Spring Cup Mid Height 4in Tall leverages spring-loaded retention mechanics to ensure zero drift under recoil and sustained fire. The mid-height profile—standing 4 inches tall—positions components in the optimal range for standard and adjustable gas systems, accommodating both carbine and rifle-length builds without requiring frame modifications. Its compact 7 x 3 x 9 inch footprint and lightweight 1.7 lbs construction minimize added mass while maximizing functionality, a critical consideration in platforms where every ounce impacts handling and maneuverability. The design eliminates common failure modes associated with loose or poorly seated assemblies, delivering the consistency law enforcement and military end-users require.

Operators rebuilding complete uppers, gunsmiths conducting maintenance, and armament specialists will find this cup essential for proper barrel extension installation and retention. It proves particularly valuable in high-round-count environments where vibration and thermal cycling create assembly stress. Installation is straightforward—position the Spring Cup Mid Height 4in Tall into the receiver extension, then seat your barrel extension with controlled pressure until the spring mechanism engages fully. This component is compatible with AR-15 and AR-10 platforms utilizing standard mil-spec receiver extensions, making it a versatile addition to any modular rifle builder's inventory.