Buffer Tube

[jackal28]

Hi, I'm building my first AR with 6 ARC. I was wandering what buffer length to use. My plan was to use a carbine but I have seen several guys using rifle length but not sure of the reasons. Any advice on this would be appreciated.

Hey, don't know about the specs of what your building, but I am prone to using A5 Tubes (2055 VSeven/ Dark Storm/ Vltor) on all of my builds. The A5 tube seems to allow for a bit more configuration and length of pull. As for the ARC, I also used the A5 tube, but the big difference between the rest is that you should probably use a medium to lightweight buffer if you expect it to cycle well. Also, use a good adjustable gas block as well. I would steer clear of the gas block BCGs since it just takes an initial failure point, adds another, and then makes it difficult to adjust and repair. 
I built my ARC as my 1K Yard gun, and it does what it was built for although it is 24". Everyone is afraid of the bolt breaking on these, but I've never noticed any wear on mine and the edges look great. It's not so much whether its 158 carpenter or 9310 Heated correctly. What matters is that it comes from a known manufacturer. Also, steer clear of the gimmicks on this gun, and stick to what you know. This is not a gun to test new stuff on. Thats what the 5.56 is for. Good Luck