Thanks for the info gents...I guess I just have to decide if it's worth the $3,500.00 to me...I wantvto say yes but damn, thats more than my UMP conversion...
416 noob question...
Will a 416 upper fit on any standard AR lower?
I would get a real 416 upper if you can (assuming it's authentic and in good condition).
I think the MR barrel is swagged, so cutting it down is not the most optimal (as I understand it).
I still have my AF uppers that were among the first available all those years ago....still remember the comments like "$3k for an upper? No upper is worth that".
Buy the 416 upper to replace the MR556 uppers until HK releases the A3 models.
If you have lots of $$$, by all means go for the HK416 upper.
There are threads on the difference between the MR556 and the HK416. Main differences are MR556 is semi only + non chrome lined.
Best of luck whichever route you decide to do down.