Pro-Shot's dual purpose design heavy-duty nylon chamber brush cleans both the chamber and star chamber/ locking lug recesses of your AR Platform rifle. The longer smaller part of the brush reaches the chamber area, while the larger diameter is meant to reach the star chamber/ locking lug recess area. Heavy-Duty nylon bristles resist breaking down with use of solvents/CLP.  

Nylon Chamber Features: 

• 
  Heavy Duty Nylon Bristles 
  ·        Superior Chamber Brush Design with Brass Core Wound Through Coupling 
•  Dual Purpose Design for Chamber & Star Chamber Cleaning
•  Precision American Standard #8-32 threads 
•  Made in USA