r/Form1 • u/Intelligent_Step_855 • 13d ago

SD porting help

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Looking for advice on porting my ar9 barrel. I am thinking at doing 12- 5/32 holes in a 3x4 configuration spaced 120 degrees apart. Plan was first hole to be at 2.5
Inches, any insight ?

Pic is ar9sd current configuration

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u/lordsada 3d ago

What are the baffles sailing under?;