Placed a call to Spike's tactical today inquiring about a lower in .308, which according to their website they don't have, but I was curious if it could be custom made, the girl on the phone said they are currently in the design stages. With that in mind I'm sure that there will be one released by this time next year. This is great news for anyone thinking about building an AR-10 especially if they like the edgy billet look. 