I am currently ready to buy a 357sig barrel for my M40A1 and I can't find one. A similar issue with the L40A1 That I planned to present to my brother very soon. I really would likw to put some Steyr sights on some my CZ items. I realize that I don't know what is actually possible in terms of extras for these pistols. Is there a stable catalog of parts for these pistols ? Is there an OEM list of things that do not drift in and out of existence. A lot of us would lie to know how far we can take these pistols before we have to go to another brand. There is nothing mercurial about personal weapons and I think Steyr does not get that. I want to know what mags, barrels and sights I can get or at least order every day. It would also help if companies like IGB would say rather than infer what they sell and make. Am I missing something that has been addressed already ?