I picked up a Magpul iPhone 5 case in OD green about a month ago after my OtterBox was no longer serviceable. The case is made of a textured plastic that snaps over the back and sides of the iPhone. It has the distinctive Magpul logo and waffle grip pattern on the case.
There are openings for the camera, flash, speakers, audio jack and lightning cable port. All of the 1/8″ headphone plugs I tried (six different pairs) with the Magpul case worked fine. A car adaptor in my wife’s car, however, had a body that was too thick to plug into the audio jack. I’ve noticed that patch cables tend to have thicker bodies, so I suspect that many will not fit through the Magpul case without some trimming of the case or the cable.