It seems that COMCAST in conjunction with their takeover of NBC have instituted a policy of not advertising firearms or accessories.
Read the whole article and you can see inequities of their stand.
I seriously doubt COMCAST / NBC will deny, for example, WAL-MART advertising time but WAL-MART sells all types of firearms, ammunition and accessories.
SO................................... I am instituting my boycott of COMCAST / NBC and their advertisers. I am blocking access to COMCAST / NBC programming on my TV and as I learn of other companies who advertise on COMCAST / NBC I will attempt to notify them that I will do my best to not purchase their product. I know that it will not always be possible to do so but if I know there is another way I will take it.