On a Saiga 20, 22". If I chop it to 18.5 or so, how much do I need ream out the gas ports?
Is there a formula for this sort of thing; expand X for each inch of barrel, for example?
I did do a search but didn't find anything relating specifically to port size.
I assume there's already a tutorial on block removal and all that, but if you have a link handy it would be helpful.