This barrel is simply amazing. the inserts that it comes with fit most standard paint. in a normal freak kit, you spend way too much money and the inserts they give you are pointless, you only use the .689 and the .691 and possibly the .687 it is a waist of money to spend so much more when the better product is cheaper. not to mention that it also looks much nicer, my friends are always saying how it matches my gun (invert Mini) and it matches paint perfectly