No need to do anything. Just take and shoot! Now, before you put any hot rounds through it, like the Hornady Critical Duty +P (which I recommend for personal defense), put 200 rounds of standard ball ammo through it to break it in. Glock test fires every pistol before it is released for sale, and they put the two casings from that test firing in each box. Congrats!!! The G19 is one of the finest pistols money can buy. It is my personal EDC pistol.