I have a M17 with a JA barrel. They can shoot well.
I believe that accuracy testing done did not find a great difference between 2 and 4 groove barrels.
Type: Posts; User: PrimePower; Keyword(s):
I have a M17 with a JA barrel. They can shoot well.
I believe that accuracy testing done did not find a great difference between 2 and 4 groove barrels.