I cleaned an AR for my dad once that he had lubed with bearing grease. After all that work, I told him no more bearing grease.
Every AR I have run has done it's absolute best with a wet coat of oil. Hoppe's oil in the orange spray can, specifically. Grease makes a downright awful mess in an AR.
Pistols are another story. I use a light, gun specific grease. It's easy to clean off when the time comes. With bearing grease, you have to bring out a heavy duty degreaser.
Every AR I have run has done it's absolute best with a wet coat of oil. Hoppe's oil in the orange spray can, specifically. Grease makes a downright awful mess in an AR.
Pistols are another story. I use a light, gun specific grease. It's easy to clean off when the time comes. With bearing grease, you have to bring out a heavy duty degreaser.