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】![](/moin_static193/solenoid/img/up.png) : 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】![](/moin_static193/solenoid/img/up.png) : 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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