2nd Edition. Neo-Anarchist's Guide to Real Life.<br/><br/>They're 'fluff' for the game.  Too slow to act as flare compensators but capable of handling the display of an ultrasound sight (which I don't think made it into 5th)<br/><br/>https://www.evenmere.org/~bts/SR/Shadowrun%20Equipment%20List.pdf (https://www.evenmere.org/~bts/SR/Shadowrun%20Equipment%20List.pdf)<br/><br/>If you're curious about how the other half lives, here is a free pdf document that lists pretty much every piece of equipment available for 2nd Ed Shadowrun<br/><br/>