I know they're two different beasts, so I'm not sure if the extra money is worth it in my case. I have the standard complete upper ordered as of right now through the GB. Range shooting, maybe some distance shooting at my Dads house (I have as much room to shoot as I want) and I'll keep it around the house for 'just in case shit'. I already have the LMT lower on order and an ACOG is on the way too. I half want to do it now just so I don't have to worry about upgrading to it later. I went with LMT over some other brands because it was a little better...and the GB helped too. So, those who knows...is the MRP worth the ~$550 extra?