Experience enhanced performance and durability with the GLOCK OEM RCL Spring Assembly G21 Gen4 - Model 30077. Designed specifically for GLOCK pistols, this assembly ensures optimal functionality and long-lasting reliability.Crafted with precision, every component reflects GLOCK's commitment to quality. Utilizing OEM parts guarantees that your firearm operates smoothly, improving both safety and efficiency in every use.Factory ReliabilityQuality ConstructionConsistent PerformanceAchieve superior shooting results with this essential upgrade for your GLOCK firearm.