Spring Cup Only L/W Non-Bearing

The Spring Cup Only L/W Non-Bearing from BSB Manufacturing is a lightweight upper spring cup assembly engineered for AR-15 and similar direct impingement rifle platforms. This component serves as a critical interface between the bolt carrier group and the hammer spring assembly, managing spring compression and providing reliable hammer reset across thousands of rounds. The non-bearing design indicates a straightforward, cost-effective construction suitable for builders and operators who prioritize simplicity and compatibility with standard mil-spec configurations.

Manufactured from steel with a durable black powder coat finish, this spring cup is designed to withstand repeated cycling and impact without degradation. The lightweight designation reduces reciprocating mass in the upper receiver assembly, contributing to slightly faster lock times and marginally reduced felt recoil compared to standard bearing-cup designs. This component accommodates 5-inch hammer springs and is configured for bolt-on installation, requiring no permanent modifications or welding. The black powder coat provides corrosion resistance and a professional appearance while maintaining dimensional consistency for optimal spring preload.

Competition shooters, AR-15 builders, and firearms enthusiasts benefit most from this lightweight option when assembling precision or lightweight rifle builds where every gram matters. Installation is straightforward—simply position the spring cup in the upper receiver, insert your hammer spring, and bolt the carrier down as normal. This component is fully compatible with standard AR-15 upper receivers and mil-spec lower receivers, making it an ideal replacement or upgrade for existing builds. Weighing just 1.05 lbs, the Spring Cup Only L/W Non-Bearing integrates seamlessly into any AR platform without requiring additional tools or modifications.