My ATP came with a couple different backstraps, like a Gen 4. Doesn't make it wider though. Can't say that bothers me, my only beef is that the grip and mags are long (G17 length) and I only carry 19's or occasionally a 26, and there's not a shorter version of the ATP that I know of.
No other issues, mags are still going strong, I just had to replace two fill valve o-rings but that's not uncommon.
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"Charles, I shan't trust you aboard my ship, unless I carry you a prisoner; for I shall have you plotting with my men, knock me on the head and run away with my ship a-pirating."