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Chamber Brushes


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.

It is available in either 5.56MM (essential for anyone that shoots an M4/M16/AR15) or 7.62MM (essential for anyone that shoots a 7.62MM rifle).

Otis' 5.56MM Chamber Brush's NSN is 1005-01-544-7698

We want to take care of you. As a customer in need of our Military products, let us find the perfect cleaning system for you at specially negotiated pricing. Please contact our Military Sales Team at or 1-800-OTISGUN (684-7486).

GSA Contract # GS-07F-0383M

Cage Code 01VS3

Otis is a Small Business in Northern NY


Image SKU Cleans Thread Size Price Quantity
FG-367 5.56MM Chamber 8-32 $4.29
IP-368 7.62MM Chamber 8-32 $4.29