BEFORE you convert.
1) Check ports, there and clear, at least three open ports is generally recommended.
Remove the gas plug, just inside on the floor of the gas block is a opening to the top of the barrel, this where your ports are.
Use a dental pick, bent paper clip or etc, to check the number and whether they are unobstructed.
When doing this you can look down the barrel and witness the pick passing all the way thru.
2) Before any conversion, clean it, lube it and then shoot the shit out of it with full power 00/slug loads, 200-500 rnds, this is the break in period.
This smooths