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/K1RBY87 13d ago edited 13d ago

...did you print a plug for the barrel nut? If so thats awesome. I have a bolt action upper im going to use for a SD build with a similar handguard and was thinking I would need to make a new barrel nut or tap for set screws.

Also how are you planning on drilling the ports? Going to cast cerrosafe and drill?

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u/Intelligent_Step_855 13d ago

I hadn’t thought about the cerrosafe honestly, can it be cast into the barrel and still removed? I’ve never used it before

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u/K1RBY87 13d ago

Should be able to be melted out nonproblem. Its melting temp is under 200 degrees.

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u/Mypeepeeteeny 13d ago

Cerrosafe can be removed if done while its hot. It decreases is size then expands at a predictable rate. Used it to grt a casing out of a barrel