Grey Birch MFG Precision Bolt Assembly For Ruger Polished Nitride Steel

Grey Birch MFG Precision Bolt Assembly For Ruger Polished Nitride Steel. The first was to tighten and control head space to .002 which significantly improves accuracy and consistency of accuracy. The second was to improve the external coating resulting in increased reliability and extended bolt life by resisting corrosion. And last but not least making assembly and disassembly easier. The Polished Nitride Finish Makes Cleaning Easy. Specifications for Grey Birch MFG Precision Bolt Assembly For