01-16-2012, 04:44 PM
He makes a larger bolt and a larger barrel extension to take an AR10 size bolt face, lug mass, etc., while still fitting in a standard AR15 carrier and upper receiver, with no mods to the upper. Anything larger like the Olympic Arms WSSM chambering require an upper with a larger inner diameter for the barrel extension.
I think the BR bolt, but with a .444"-.450" bolt face would make a great bolt for the Grendel, since the Grendel case is actually a high-pressure component, limited currently by the modified 5.56 bolt with minimal material in the lug roots and bolt face web. You would be able to push the cartridge with velocities maybe 100fps faster with the BR bolt using a correct bolt face for the Grendel.
I think the BR bolt, but with a .444"-.450" bolt face would make a great bolt for the Grendel, since the Grendel case is actually a high-pressure component, limited currently by the modified 5.56 bolt with minimal material in the lug roots and bolt face web. You would be able to push the cartridge with velocities maybe 100fps faster with the BR bolt using a correct bolt face for the Grendel.