The tapered bronze bristles of the Otis chamber brush scrub the chamber, neck and shoulder. The steel bristles at the base scrub the star chamber of the locking lugs. The brass stem is cold welded to the core, and the tip is folded, not cut. The chamber brush has a standard 8-32 thread and the 5.56mm option is essential for anyone that shoots an M4, M16, or AR-15.
Specifications:
- Fits: M4, M16, AR-15
- Caliber: 223 Cal/5.56mm
- 8-32 Thread Size
- Tapered bronze bristles scrub the chamber, neck and shoulder
- Steel bristles at the base scrub the star chamber of the locking lugs
- Brass stem is cold welded to the core, and the tip is folded, not cut
