I have one of the IAC guns - having Coyote Cap's nice American walnut. I went through a long checklist of all know issues/"fixes". Most weren't needed (already improved at factory). Don't know if/where I might have that list - I downloaded from somewhere(?) & I have dozens of DVDs full of good stuff, yet unpacked after moving last year. I do recall fussing over the movement/action of the extractors & extractors springs to get it running to my satisfaction. No problem running star crimped plastic 2 3/4" shells - from any manufacturer. I also did a slight mod to the follower, making something of a drop-two type mod. This doesn't interfere with functioning of the magazine, so I can load-up for field use on critters. Impossible to say all production runs are identical - lots of unknowns. The extra treat was having Cap attend my club's two annual multi-day matches (St Jude's & Fall Roundup) for many years. Cap usually on my posse & I'd use the 87' occasionally so Cap could see the fine walnut he bought/shipped for HIS run of guns that ended up on another importer's run - he had a great sense of humor. Great times and a few technical conversations about making guns, which was my occupation at the time. Sad when things change - Cap's gone🙏😥 & both of those fun matches cancelled in favor of a State SASS match 😟
Slim