I use as heavy a buffer as the gun will lock the bolt back on an empty mag. It surprised me that my mid length Noveske actually needed an H2 to run properly.
A Daniel Defense carbine gassed I had needed only an H buffer.
It must lock the bolt back on an empty mag and eject spent cases at 4:00 It all depends on the port size. But you'll really feel the difference when shooting off hand.
The advice about buffers earlier in this thread is helpful, thanks.
re. the ejection at 4:00 - I've got a 308 AR that ejects slightly forward, about 2:00. What does that indicate about gas and buffer weights? I haven't tried tuning anything yet.
