I don't have any experience with ergo products, but found the ERGO Z RAIL TWO PIECE REPLACEMENT HANDGUARD SYSTEM and it looked like a good fit for what I want to do, so found it on amazon for $120 shipped. I was going to just add a magpul AFG2 to it, probably nothing else right now. I prefer the simplicity look over bunch of attachments. Are the ergo products pretty decent? Merry Christmas!