I read Popular Mechanics regularly. Before I used the Internet and found AR15.com, that was the only way I could keep up with military technology developments.
I used to read Popular Science, but they were too politically correct. Every other month some soccer mom would write either of them and blast them for their gun ads or articles on guns and weapons technology. Popular Science caved in and you will hardly ever see any article about weapons technology that isn't military based or they have an article every so often on how technology can help with gun control.
On the other hand, Popular Mechanics' editor-in-chief got so tired defending themselves from the soccer moms, he blasted back in a full page editorial about how they are a magazine about technology and how firearm technologies had a proper place in the magazine. They will not bow down to politics, their position is to neutrally cover technology with no preconceived notions whether it's "bad" or "good."
They have as many articles about weapons tech as they do car tech usually and they try to stay neutral telling as many cons and pros as they can.