Sons of Liberty Gun Works Pistol Grip Lock Washer Features Manufactured from high-strength steel this Mil-Spec pistol grip lock washer provides a durable and reliable locking mechanism for securing the pistol grip screw. Its corrosion-resistant finish enhances longevity and ensures a firm grip between the pistol grip and lower receiver. Designed as a drop-in replacement this washer is fully compatible with all Mil-Spec AR-15 lower receivers making installation quick and simple. Whether replacing a lost washer or completing a new rifle build this OEM pistol grip lock washer ensures long-term reliability. Sons of Liberty Gun Works Pistol Grip Lock Washer Specifications Compatibility: Mil-Spec AR-15 Function: Secures Pistol Grip Screw and Prevents Loosening Material: High-Strength Steel Installation: Drop-in Replacement for Mil-Spec Receivers