Very possible. The only thing that makes me think it wasn't the case was that he mentioned that he can buy it at Outdoor World (another line I failed to mention).... so with Outdoor World over here only existing for a few years, that would rule it out too.
My best guess thus far is that he has a Smith and Wesson M&P in .40S&W, assumes that all black pistols are called Glocks just like how most of us call all plastic bandages bandaids, or facial tissue kleenex. The number 16 comes from the number of rounds that the gun will accept (15+1 = 16).... and assumes that all handgun ammunition is a manufacturer specific version of 9mm.