New member from the poorly labeled Free State of Maryland, have learned quite a bit about building my .308 rifles just from the posts I have been reading. My first one was a total failure, all the problems listed I seemed to find. So now I am working on an Aero Precision build with mostly M5 parts, upper 18" rifle length gas with a listed .0890 gas port and the adjustable block. Used the recommended orange spring in the aero carbine tube, but may have gone too far with the KVP AR10 SS buffer that all said and done was about 5.7oz. As of yet have not fired this version, so I am hoping for the best. I like to shoot outdoor ranges and just not a fan of the indoor shooting, so waiting for better weather. Hope that it goes well. My BCA is still a work in progress. Have been following the "waterboarding" to the letter (I hope)