Just wanted to crow a little in reporting a small success.
A buddy of mine grew up in CA and doesn't have too much firearms experience. Enough that he says "I can shoot well" but given how he's talked about it over the years.... I'd have to see the bullet holes in the paper before I believe him. He's quite liberal but not overly politically active. The extant of it is pretty much facebook activism. He knows A LOT of people, though, so when I started correcting his anti-gun facebook meme posts with such things as facts and statistics it got a little attention from a lot of people.
He was concerned at one point that I was upset with him and called me on it. I was able to get it across that I don't care if he is anti-gun - I just want him to be well informed. I know a lot about firearms (by comparison, at least) and I was correcting the parts of his posts that were just wrong. No, you can't "easily" convert an AR-15 into a machine gun even if it looks just like one. I even pulled apart my CETME and showed him the parts that were altered so that it could not be restored to selective fire and pointed out that just having the parts to do so is already a federal felony.
I also pointed him to the actual statistics about gun violence. Not preaching, just pointing out that long arms of any kind are a small fraction of any kind of gun violence and that about half of the deaths due to guns are in fact suicides, and that police shootings in the line of duty are also included in those figures. That crime of all kinds is lower in areas where people commonly (legally) carry guns. That historically the only way mass shootings are stopped with the least casualties.... ever... is by armed civilians. That mag cap limits and "assault weapons" bans didn't stop or even slow the Columbine mass shooting. I wasn't arguing with his beliefs, I just figured he should know that parts of what he was basing his views on was incorrect. Correct information always leads to better decisions so I was trying to help him.
He now posts things like this:

