The MR's?!?Is there a barrel thickness to stay away from?
In my case, my 14.5" 416 barrel was 22.5mm thick behind the gas block and had the goofy grenade launcher cut out in front of it. The MR's is 25mm, lacks the cut out, and is longer. So, the answer is no.Is the thickest barrel on the 416 (14.5 inch as a example) comparable to the mr556 in weight?