This is my first build and I have chosen to go with a Carbine length Buffer tube and an 18" barrel with rifle length gas block. My question is: Due to the rifle length gas port, should I use a standard carbine buffer or Carbine H buffer? I understand that too heavy of a buffer like H2 or H3 may not cycle the bolt assembly correctly. Any suggestions or pointers, I am open to making buffer tube changes at this point.

Best regards,
Imspuds

H2. H if you already have it.

Thank you Combat_Jack