Later post 1990 10×32 base Line SI powertube. The threads on these giant base tubes are 10×32 and the ID is huge. They are hard to find.
And more articles on Line SI Bushmasters here.
Later post 1990 10×32 base Line SI powertube. The threads on these giant base tubes are 10×32 and the ID is huge. They are hard to find.
And more articles on Line SI Bushmasters here.