Here are the specifications for the nylon chamber brushes:
- Material: Nylon bristles, brass stem
- M16: Overall length of 3-7/8" (9.8cm), with an 8-36 thread
- AR-15: Overall length of 3-7/8" (9.8cm), with an 8-32 standard thread
- AR-10: Overall length of 4-3/8" (11.2cm), with an 8-32 standard thread
These brushes are designed to aggressively scrub the chamber and reach the locking lug recess of M16, AR-15, and AR-10 rifles, providing effective cleaning.