Grendel as a Universal Infantry Cartridge

[LRRPF52]

You can put an AR10 bolt face and lugs, as well as the appropriate size barrel extension in the AR15-size platform, although it does require a new bolt carrier and upper receiver as Remington did with the .30 RAR. That uses a .473" cartridge base, but you don't need to go that far, as AR Performance has proven with their 6mm BR bolt and barrel extension combo. The 6mm BR also is a .473" cartridge base. Since the Grendel is smaller, that would just give us more beef, and no more shorn lugs.

LRRPF52