In to my third 308 AR but instead of having the first two built for me, I'm going to build part of it myself and then have others that specialize in these builds handle the more critical components. The barrel, bolt and trigger have traditionally been the critical components when building an accurate AR, but hearing more and more about heavy buffers. The buffers are more about recoil reduction than accuracy, but curious if anyone has any experience with these products such as those available from heavybuffers.com or Endine. Any issues with reliability/feeding? $100+ seems a little much for a buffer but not really sure what the advantages are in using them.