I've got everything except for the gas block for my first complete build, and post office says Monday delivery for that. Couple of questions for you experienced builders.

1. Grease for barrel nut. I've got some permatex anti seize lubricant, but it has graphite. I've read that you shouldn't use a graphite based lube. Also have an old tub of Slick 50 One Grease. It has teflon and says for use on wheel bearings and other high temperature/high pressure applications. The word graphite doesn't appear anywhere on the tub. Any problems with using the Slick 50?

2. It seems like I read somewhere not to over tighten the flash hider/muzzle break. I'm using a Seekins Nest flash hider. It doesn't need indexed and doesn't use a crush washer. I'm thinking about a drop of red loctite and just snug it up. Any thoughts?

Thanks.