My Ruger SR-556 has a hard chrome BCG and my recent MEGA build has a NicBor BCG. I'm not looking to get into the debate of phosphate vs HC vs NicBor or anything, this is just to visually show the differences.
The word is Young MFG makes the group for Ruger and the other is a Rainier Arms Match Grade group. Young MFG carriers are impossible to find right now or the MEGA would have one because IMO, they're the best groups out there. I had the last one Rainier had in stock but it was out of spec so they sent me their best BCG they had on hand.
Here's the gallery.
Hard Chrome vs NicBor - Imgur
The word is Young MFG makes the group for Ruger and the other is a Rainier Arms Match Grade group. Young MFG carriers are impossible to find right now or the MEGA would have one because IMO, they're the best groups out there. I had the last one Rainier had in stock but it was out of spec so they sent me their best BCG they had on hand.
Here's the gallery.
Hard Chrome vs NicBor - Imgur