All Purpose (AP) or Utility brushes are very handy to have when cleaning firearms. They have the ability to get grit, grime and fouling out of those hard to reach areas like muzzle brakes/flash hiders, gas piston heads, bolt faces, action recesses, handgun slides, etc. Utility or AP brushes come in 2 varieties…bronze and nylon. Which is better?
I use both bronze and nylon AP brushes. The nylon are softer and are used to remove light fouling or debris whereas the bronze brushes are better for hard to remove fouling and carbon buildup. Both are safe to use on firearms. I like to use the nylon brushes in the gas tube of my AK-47. It cleans it very nicely. But I use a bronze brush on the gas piston.
Here’s a nice 9 pack from Otis. You get 3 blue (extra stiff) nylon, 3 white (soft) nylon and 3 bronze AP brushes. They are double ended so you can get into very small areas or scrub large surfaces easily. Here’s a link to get a pack of these….Otis 9 Pack of All Purpose Gun Cleaning Brushes from Amazon.com