Gun scrubber in the original form can play havoc on some plastics and rubber no doubt , BUT there is a "synthetic safe" gun scrubber on the market in case you did not know, I would still use caution regardless but for what it is worth , I wear latex gloves when cleaning my guns , the original gun scrubber will eat threw those gloves in about 10 seconds , the "synthetic safe" does not seem to eat threw them at all. The original stuff is a bit cheaper and that is what I use when no plastic/rubber contact will be made. If it might contact those things I use the synthetic safe stuff.