r****d
发帖数: 375 | | S**********s
发帖数: 4534 | 2 SQR is a quad rail; quad rails are heavy, and heavy ARs are not very
versatile.
SSK is a lightweight keymod freefloating handguard made by Midwest
industries, good stuff.
I think 18" barrels are a great idea. Ballistically they are very close to
the full 20" rifle, while 16" suffers a bit from the loss of velocity, which
the 5.56x45mm depends heavily upon.
But in this case neither upper is ideal because of the heavy barrel. Unless
you want to build a target rifle, Pencil or a2 / government is the way to go.
【在 r****d 的大作中提到】
: 请问下面两把upper的rail有啥区别:
: http://palmettostatearmory.com/index.php/psa-18-chf-heavy-sqr-1
: http://palmettostatearmory.com/index.php/psa-18-chf-heavy-ssk-1
: 另外,第一把AR是不是16"的barrel好些?
| r****d
发帖数: 375 | 3 Thank you very much for the detailed explanation. One more favor to ask, how
do you think about the following upper:
http://palmettostatearmory.com/index.php/ptac-16-m4-1-7-5-56-na
which
Unless
go.
【在 S**********s 的大作中提到】
: SQR is a quad rail; quad rails are heavy, and heavy ARs are not very
: versatile.
: SSK is a lightweight keymod freefloating handguard made by Midwest
: industries, good stuff.
: I think 18" barrels are a great idea. Ballistically they are very close to
: the full 20" rifle, while 16" suffers a bit from the loss of velocity, which
: the 5.56x45mm depends heavily upon.
: But in this case neither upper is ideal because of the heavy barrel. Unless
: you want to build a target rifle, Pencil or a2 / government is the way to go.
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