Agree with other posters...not a fan of metal particles being in my grease except for hi-temp environments that burn the grease away and leave behind an aluminum or copper coating on parts that might otherwise rust. Anti-sieze has its place but I really can't think of where that is on a gun unless a suppressor on a full auto rifle.
No ant seize for me. I use a lot of synthetic bicycle racing grease for different things, including barrels. That is threads on both ends.
i like lucas red and tacky high pressure grease a little goes a long way it has antiseize properties but no metals great stuffI use nothing on my suppressor threads. The only folks that I knew that used some sort of anti-seize or grease on their suppressor threads ended up sending their cans down-range, so they don't do it anymore either.
As for my barrels, I use Permatex 77124 (Nickel Anti-Seize). For those worried about having metal in there, the particles are not anywhere close to being big enough to worry about. The one with copper in it can react with SS, and regular grease will end up deteriorating due to the heat and pressure that it will undergo.
I also use it on thread protectors and scope base screw threads. I know most think thread lock on the base screws, but I’m not a fan.The only thing I use nickle anti seize on is choke tubes on shotguns.
I also generally use a thread lock on the base screws. Have you ever had a base come loose with the anti seize. TKSI also use it on thread protectors and scope base screw threads. I know most think thread lock on the base screws, but I’m not a fan.