JE Machine Tech AR Anti Walk/Anti-Rotation Pin Set Black. During sustained fire sessions or over time the pins from your fire control group tend to rotate causing premature damage to your rifle/pistol. Anti-Walk pins are designed to prevent these critical components from failing when you need them the most. Specifications for JE Machine Tech AR Anti-Walk/Anti-Rotation Pin Set: Manufacturer: JE Machine Tech Color: Black Features of JE Machine Tech AR Anti-Walk/Anti-Rotation Pin Set OEM-Spec to work with OEM spec FCGs and lower receivers One-piece dog bone style connectors to prevent rotation Package Contents: JE Machine Tech AR Anti-Walk/Anti-Rotation Pin Set JE Machine Tech TS-ARAWP2B: AR Anti Walk/Anti-Rotation Pin Set Black