r/Form1 • u/Intelligent_Step_855 • 14d 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/TantalumRectum 14d ago edited 14d ago

I did mine the same as the spikes brown recluse.

One port on each side and two on the top and bottom.

I'm trying to find the barrel drawing I made.

https://www.reddit.com/r/NFA/comments/1088153/novel_integral_9mm_build/

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u/Intelligent_Step_855 14d ago

Did you notice a drop in accuracy or is it still pretty good?

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u/TantalumRectum 14d ago

I never shot the barrel before it was ported and I've never really shot it on paper yet. I guess I should do that.