Dont forget to watch out for the buffer retainer and spring as well as the takedown pin retainer and spring. They will both want to come out and play when you disassemble the tube.
One other thing to watch for, is that you dont let the castle nut wrench contact the threads on your buffer tube. I marred mine doing this. No issue beyond cosmetic, but if you want your rifle to be pristine it's something to watch for. Luckily, I'm not a safe queen kind of guy, and a sharpie fixed it just fine for me.
BBS had the wrench last time I walked in. But can make them easy. Look at the guys making wrenches for their M14 castle nuts.



























