Everything about this kit is good except one thing. - Aero Precision M5 .308 Enhanced Lower Parts Kit w/No FCG or Pistol Grip

The only thing from this parts kit that didn't work, was the bolt catch set screw. It wasn't even close to the size it needed to be. Every AR 308 lower that I've seen had either a roll pin, or 6-32 thread pitch set screw. This one was a lot smaller (didn't even engage the threads...just pushed right through). Other than that, everything else fit perfectly. If you get this kit, just spend the extra few bucks and buy a separate threaded bolt catch pin (about $3), or Home Depot has stainless 6-32 set screws for just over a buck.