Re: Left Handed AR 15 bolt
Nobody makes a left-handed AR-15 bolt for the 6.5 Grendel yet. Your only option is to: 1) modify an existing 6.5 bolt; or 2) get a machist to make you one. Either way, it won't be cheap! Even if you find a good smith or machinist to modify a bolt for you, good luck getting anyone to guarantee it to function properly.
You might try Steve at ADCO and see if he has any ideas for you or if he'd be willing to undertake the project. Also, run a search on the 65Grendel.com forums and see if anyone over there can point you in the right direction. Lots of folks dedicated to the Grendel platform (understandably so) and a wealth of information.