Looks great but had to modify a little to fit my aero gen2 lower - Strike Industries Extended Pivot / Takedown Pins

Had to sand down the longer flat side of the pivot/front pin. At first it wouldn't insert all the way without really forcing it into place and even then the dentent wouldn't engage. I used a dummel tool to sand/grind down the longer side you see in the picture. It didn't take much sanding/grinding to fit and now works great. My lower is not coated at all and is a Aero Gen2.