Springfield Armory 1911 Plunger Tube Spring Features The Springfield Armory 1911 Plunger Tube Spring is manufactured from steel to Springfield Armory s exacting specifications ensuring correct spring tension and fitment within the 1911 plunger tube assembly that maintains reliable slide stop and thumb safety detent function through sustained use. As a genuine factory OEM component it matches the original specification precisely delivering the spring tension and dimensional accuracy that aftermarket alternatives cannot replicate on the 1911 platform. Correct plunger tube spring tension is critical to positive slide stop engagement and reliable thumb safety detent function and this factory replacement ensures that performance is restored to the original design specification without compromise. Simple to install by a competent armorer this 1911 plunger tube spring is an invaluable addition to any 1911 owner s spare parts kit for quick repairs and unexpected maintenance needs. For 1911 owners and armorers who demand factory-correct components throughout the plunger tube assembly this spring is the definitive replacement. Springfield Armory 1911 Plunger Tube Spring Specifications Manufacturer: Springfield Armory Model: 1911 Plunger Tube Spring Material: Steel Firearm Fit: Springfield Armory 1911 universal 1911-pattern