As Tom mentioned the gas block should seal. However the abundance of oil in the chamber may be preventing that from occurring because it's now working its way through the gas block. I would pop the block off. Clean everything and start over
Weeks before the elections I had a go around with his people when they came door knocking. This guy's performance in office as well as his personal life are a joke. Unfortunately when Linda Mcmahon spoke the truth nobody would listen and she was easily defeated. This tool along with Blumenthal have been arm in arm with Feinstien.
I tried to get my closest fellow CT shooters to do the same. You know, the same ones calling and emailing to see if I have or know where to get mags. Suddenly in 2013 they are realizing 2 AR15 or Glock mags just might not be a life time supply.
Slash says this The ArmaLite AR10 carbine buffer is actually an AR15 H3 buffer and can only be used with an extended length buffer tube (ArmaLite/Vltor). The DPMS buffer is an H3 buffer with 3/4" cut off and one less Tungsten weight. It weighs about the same a .223 carbine buffer and is too light for a .308 in my opinion. Many DPMS owners turn to me when their factory .308 carbines start breaking parts.