Mobil 28 grease (geissele trigger grease). This is the exact same stuff they give you a tiny thimble of with their triggers. This stuff is perfect for any trigger contact points. You can also use it on slide rails or really any other moving metal on metal parts. .5oz loaded in a curved syringe, perfect for applying to contact points. I have many to sell. $7 shipped for 1. $12 for 2 or $15 for 3. I take Paypal and ship with tracking same day.