Hello Jack,
Thank you for sharing your thought with us. Please take a look at the following video and you will see it is Tool-Free Plug Design for you to disassemble and reassemble the bolt/hammer assembly.
https://youtu.be/9WiQZsArRL8
As to the question about tournament grade, please take a look at our tournament grade paintball marker here (https://mercuryrise.com/products/paintball-marker-lava-68-caliber).
Please feel free to let us know if you have any question about these. Have a good game.