Ahhhh, so it there's an option availble from HK. We only get the 16.5" MR762 and it does not have one. If you have time, can you check your operator's manual and see if there is a part number listed for that and PM it to me?The backplate came standard on my 20 inch 2011 manufactured MR308. I could post photos in the mentioned thread IF I only could post photos! I don't know what is the problem but I am not able to do that.
^^^this is true for the MR556. NOT the MR762. The backplate with ambidextrous sling attachments is part# 227383...same as 417. Much larger than mil spec or commercial buffer tube for M4, AR-15, etc. We should have some in stock in the next few days. No price available yet.HK customer service emailed me with: Any standard mil spec back plate will work.