This is a collector’s site with a large number of nice photos. Most of his collection is large caliber ordnance, but there are some pages with SAA as well. He collects primarily from WWI through WW2. There are several very nice cross-sections of projectiles and fuzes (take a look at the sectioned 90mm recoilless HEAT and HE near the bottom of this page: http://ordnanceandmilitaria.com/88-to-100mm-ammo). He also has mines, grenades and a nice page of machinegun belts and magazines.
I found that the text doesn’t always format correctly on my screen and is hidden behind the photos, even though I am using Google Chrome as he recommends. But I was able in most cases to triple-click the text (which should select the entire caption), then copy and paste it into a text editor to read the descriptions. He also cautions that his descriptions are probably not 100% correct and welcomes corrections.
I don’t know if this collector is a member of the IAA (no mention that I could find). He is also starting to sell off his collection but limits sales mainly to Australian collectors (see link on his site).