What about sending a gun lock or trigger lock to DC instead? They are much smaller and postage won't nearly be as much as a cinderblock, and they get the message across better too.
If they get 4,000,000 trigger locks, well you can do the math...
Sending weapons related stuff might be a REALLY bad idea. We did that once back when they were considering nation wide mandatory trigger lock BS.
I'd be hesitant to send anything firearms related. It's way too easy to interpret it as a threat. The cinderblocks sounds like a good idea, but I'm betting UPS refuses to deliver them after about a day. The congressional mailroom will refuse to accept them, and so UPS will refuse to carry them.
I think the Brick/cinderblock approach is better. I REALLY like the Cinderblock.
They're big, heavy and pretty near useless unless they decide to build that wall.
If this sites goes up, I will send SEVERAL.
PLEASE .... DO IT!!!!!!
Trigger locks don't equate with building a wall. Maybe for 2nd Amendment issues.