Yeah it is a bull barrel. The Zombie Killer doesn't come in the kit, and its not a sticker, its a Custom CNC bolt engraved with it saying Zombie Killer
. I decided to upgrade my factory bolt to a CNC and I found this company JWH Custom who sells them and engraved as well for a reasonable price. You can check out all their designs www.jwhcustom.com
or see if they can make something specific you might want
Yeah I didnt find it too difficult to install it.
Glad you are getting it today! Cant wait for the updates!