What are you defining as today's AKs? I can't compare AK-10X series guns as I have no access to them. By "today's AR's" I'm referring to the relatively standard quality control and construction found in virtually any gun the average consumer would find in a shop (or the parts the average consumer would use to put one together) as opposed to the general lack of standard quality control and quality construction found in the various imported parts kits (Romanian's, Maadi's, Bulgy's, etc etc), the lack thereof found in MANY guns assembled from those kits by various shops which comprise a large percentage of AK's available to the average consumer (I'm looking at you Century..), and even the lack thereof found in guns produced under the Saiga name by Izhevsk, which AFAIK is actually the main producer of the AK-10X series anyway.
Also, what makes you think that today's ARs are more reliable than today's AKs? This is news to me. I agree that today's AR-15s are far more reliable than they were in the past, but to call them more reliable than an AK seems like a bit of a stretch IMO.
The Glock trigger is great as-is from the factory, disregarding the slight weakness of the trigger spring durability. Differences in mechanical accuracy from a Glock to a high dollar 1911 will likely have alot to do with custom fitting of the frame, slide, barrel, and bushing of the 1911. Triggers and sights and so forth are factors that let the shooter tap into that mechanical potential. Regardless, at short distances the differences are arguably negligible. I agree with you about the differences being arguably negligible for rifles at those distances as well.
Similarly, one of the things that makes the 1911 such a great pistol is it's light trigger pull. That doesn't make the weapon accurate in itself, but it does allow for a shooter to handle it accurately more easily. On the other hand, many people call Glock pistols inaccurate, saying that they're only capable of 3" groups at 15 yards compared to 1 hole groups capable with hight end 1911s. But it isn't necessarily true, and many competitive shooters choose Glocks and even keep the triggers stock. It's actually a very accurate pistol, easily capable of 1" groups at 15 yards with enough practice..