ok lets get off the other thread and disscuss gas systems on an ar15 platfrom.
sub guns(under 16)
16...m4 etc
mid longer than 16/shoter than 20
20's
longer than 20/out to 24
and then longer than 24.
i just started on my first 2 16's( a 5.56 and a 7.62x39)
i have several std 20's
and one 26 with the gas block moved to plus 2"
it is a 1/14 with just 52/53's at 3500/3600fps.....works well.
your turn...this is a new area for me....