Volquartsen Firearms Target Hammer for Remington 597 Silver. The hammer notch is then individually surface ground to assure an exact angle of engagement. It will provide a 50percent (approx) lighter trigger pull. It is a drop in item designed to be used in an unaltered factory trigger guard. Made of A2 tool steel hardened to Rc 58-60 ? Fits the Remington 597 22LR 22 WMR and 17 HMR. Specifications for Volquartsen Firearms Target Hammer for Remington 597: Manufacturer: Volquartsen Firearms Color: Silver Fabric/Material: A2 Tool Steel Gun Model: Remington Model 597 Hardness: HRC 58-60 Country of Origin: USA Package Contents: Volquartsen Firearms Target Hammer for Remington 597 What firearm models does the manufacturer say Volquartsen Firearms Target Hammer for Remington 597 is compatible with? The manufacturer says that Volquartsen Firearms Target Hammer for Remington 597 is compatible with Remington Model 597Volquartsen Firearms VCRTH: Target Hammer for Remington 597 Silver