Once upon a once -- back during the first month or so when I was experiencing the joys of concealed carry -- I had an NRA sticker on my car's rear window. Also, I had one on my front door.
Then, after a few months of a bit more thought -- and after reading other opinions here and at USCCA -- I came to think that, as the fellow said here, the operative word in CCW is CONCEALED.
Today I have no firearm related stickers on my car, house or about my person. In the dooryard to my office, however, I have a metal sign, black background with white letters that reads: IF YOU CAN READ THIS, YOU'RE IN RANGE. It generates a LOT of positive comments from customers but not one person has asked if I carry a firearm.
Bottom line, I'd stay away from the oval A sticker and all others that might betray you as one who carries a concealed weapon.
Have a day. Bang Gunley