screwupman2022

引用:

原帖由 AICSman 於 28-3-2019 01:33 發表


base on the video, it can.

Keep in mind that a typical Combat ar15 required about 2-3moa accuracy at 100 yards when manufactured. an average male shoulder width is about 18". Effective range f ...

元祖代的 Colt SP1 AR-15...其pencil barrel幼槍管 沒經stress relieved...只是快射了一隻30發彈匣，之後彈著點偏移了大約4吋多(100碼遠)，thermal shift of POI咁L西利：https://youtu.be/QTovPt4weIs?t=545

AICSman

引用:

原帖由 screwupman2022 於 28-3-2019 18:12 發表

元祖代的 Colt SP1 AR-15...其pencil barrel幼槍管 沒經stress relieved...只是快射了一隻30發彈匣，之後彈著點偏移了大約4吋多(100碼遠)，thermal shift of POI咁L西利：https://youtu.be/QTovPt4weIs?t=545;scar ...

it was "design" to reach target no more than 300 yards back in the days.