These brushes have a 4" long natural bristle section on a 16" wire handle. Simply break down your gun
and use these brushes to clean unburned powder and other firing residue from the receiver.
Three sizes are offered. From the top, they are:
1-1/4" for S&W 76 receivers and 9mm magazine bodies.
1-1/2" for MP 40, Sten, & Swedish K receivers as well as .45 ACP magazines.
1-3/4" for M3 "Grease Guns".