In the midst of my recent AR woes I have been presentd with the opportunity to purchase a Bushmaster Dissipator (a2 config) for around $700. (price is not set in stone) Everything looks great and there a few extras. Is there anything I should be aware of before dropping the cash and making this my new project gun and interim SHTF AR while my beloved custom AR gets a new barrel? I'm thinking some rifle length rails and new stock are coming. A new sight and bi-pod have been ordered.