07-20-2018, 10:40 PM
Hey 65 Grendeleers..so Im building my first upper, a 6.5 Grendel, which will be built around the Group Buy 16 barrel and matching GB bolt.
My question is this...since the barrel and bolt were manufactured for each other is it truly necessary to get a headspace gauge and check it?
Thanks
My question is this...since the barrel and bolt were manufactured for each other is it truly necessary to get a headspace gauge and check it?
Thanks

