08-25-2016, 01:26 PM
I figured someone would ask. The bottom metal is ATI polymer distributed by Legacy Sports International. I used their .223 magazine and ground on the inside of the feed lips to make the slot wide enough for the fatter Grendel case to be high enough to get picked up by the bolt. I also shortened the feed lips so the round would be released before the bullet touched the upper portion of the chamber approach. Basically I tried to duplicate the position of the .308 round in their .308 mag which works very well BTW.