Here Joe, I just took a quick snapshot for you. Maybe this will help you out.
That is my 5MDH with my M6 and 40/1.4 in there. The camera and lens take up less than half the inside compartment. I can also fit my Hasselblad and light meter in there along with several rolls of film.
The 6MDH jumps up quite a bit in size, so in my opinion, the 5MDH is the biggest of the portable, walkaround Crumpler camera bags. I have two 7MDH bags, one of which is always preloaded with three or four lenses, a DSLR (two if I really cram it in), two flashes, and swamp water of cords and batteries and adapters. The 6MDH bag isn't that much smaller than the 7MDH.
But I do love Crumpler bags. I own five! 😀