Re: DPMS .308
EDITED: I just wanted to clarify my earlier post. I originally indicated that you would need a specific, 308 gas tube. That is NOT correct for the DPMS platform. For some reason, I was looking at this as an AR-10 (Armalite) question and NOT an LR-308. The DPMS rifles use regular AR-15 gas tubes by the same length designations (carbine, mid, rifle). ONLY the Armalite AR-10 requires a longer gas tube.
Also...what do you mean by "Scout"? DPMS doesn't offer a "scout" rifle/upper. Do you mean Sportical? SASS? AP4? The AP4 has a lighter weight profile (similar to an M4 contour found on the AR-15). If you did mean the AP4, there is one for sale in the ARFCOM AR-10 sale forum with the FSB, Gas tube, teflon coated black for $230.