LANTAC ESP-S Ultra Smooth Safety Plunger/Spring Glock 9mm/.40 SW/.357 Sig/10mm/.45 GAP Stainless Steel. Comes complete with a reduced power spring for additional smoothness to trigger pull. Specifications for LANTAC ESP-S Ultra Smooth Glock Safety Plunger/Spring: Manufacturer: LANTAC Color: Stainless Steel Gun Make: Glock Caliber: .45 GAP .357 SIG 9mm Luger .40 S&W 10mm Auto Condition: New Features of LANTAC ESP-S Ultra Smooth Glock Safety Plunger/Spring: Fits most 9mm .40S&W .357 Sig 10mm & .45 GAP Glock Pistols. Package Contents: LANTAC ESP-S Ultra Smooth Glock Safety Plunger/Spring LANTAC 01-GP-ESP-SS: ESP-S Ultra Smooth Safety Plunger/Spring Glock 9mm/.40 S&W/.357 Sig/10mm/.45 GAP Stainless Steel