AR Bolt question

[buto]

http://www.riflegear.com/p-865-daniel-defense-full-auto-bolt-carrier-group.aspx

Is that for a 223? Or does it not matter and will work for 223 and 5.56? Thanks for any help. I plan on driving down sometime and buying a spikes zombie lower.

[Riflegear]

Works for both. You'll do fine with either 5.56 or .223 with this bolt carrier group.