I fired the M-2 HB with infrared. You got one shot and the whole screen did a white out. Took a while for the screen to come back to normal. I was driving an APC with infrared periscopes and watching a guy out in front of me with a cigarette in his hand. I could barely make him out until he took a drag, then a very large area lit up. Miserable equipment to work with. I doubt the military uses any infrared anymore.
Your statement brought me to a shocking revelation.
I actually have an impressive and fairly extensive private library for an average person. But I realized that I don't have one book related to firearms. I have books that relate to my profession and I have books on almost anything that interest me. I have fiction as well as no fiction. My wife has a good collection too.
Not really sure why I don't have gun books, I should Change that.
That would be a very long list of books: handguns/rifles/shotguns; guns for hunting; guns for target shooting; guns for self-defense; primitive guns; historical guns; reloading; gunsmith/disassembly gun books; guns for collectors; military guns; books on ballistics, etc., etc. I'm glad I started accumulating/collecting books on guns and related subjects a very long time ago. That said, if you have even a passing interest in firearms, assembling a basic set of reference books is always a good idea.