I have an older Sig catalog which shows both. As some have noted, the 228 and 229 are very similar, the main difference being that the 229 has a stainless slide (both have an alloy frame that seems identical). Actually the slides are otherwise slightly different: on the 228, there's a recessed cut on each side of the top of the slide that ends before you reach the cocking serrations; on the 229, the recessed cuts go all the way back, full length along the slide, and the cocking serrations are below the cut (I guess you have to see it to understand, but it makes them identifiable at a glance). Also, 228 is only in 9mm. No mention in the catalog about DOA. According to the catalog, the 228 was invented for use by the military, as the M11, and is (was?) also used by the FBI and other gov't agencies as a compact handgun. The 229 was later and went on to largely replace the 228. Of course now the 229 is only 10-shot, but, back then, the 9mm versions of both were 14. If I was stuck with a 10-shot, I think I'd go to the 239 which, although only 8-shot (in 9 mm), is much more compact. Just my 2 cents all around. Peter F.