Looks good dude, as far as a brake look at an APA little bastard brake, it's a self indexing system you can do yourself and it's a very effective brake as well, 5/8 24 thread is the standard, Harris bipod type S with pod lock adjustment lever ( if it doesn't have one just order it from Sinclair int.) for a mount there is a lot of good options I have run a few Near Alfa mounts and Sphur mounts as well both are very well built but do cost a bit but worth it ($450-550) they both are built like a tank and will stand up to anything you will put it through. Since you have a 20 MOA rail a good set of rings would do just fine as well NF, US optics, TPS, ATRS just to name a few. This is just a lot of personal preference stuff I have run in the past, the stuff you already have is gonna work as well if I had to say one thing it would be run what you have and pour you esters cash into a high end scope....you will never regret that move, then upgrade other components as cash allows.