I agree with ammodave. Mine doesn't have the marks that you describe but I wouldn't be afraid to put a couple down the pipe and see how it goes. Happy shooting! Cheers
I ordered the Ameriglo Pro I-Dot last week. Getting anxious to get those bad boys put on! Just an fyi though, you can find them on Ebay for around $89 shipped free. I bought mine from Ameriglo and found this out after the fact.
Hello, just FYI, I was able to order a 9mm barrel (for my .40 cal Shield) from Smith & Wesson over the telephone on 3/15/13. They said it was temporarily out of stock but would be shipped to me in approx. 10 business days. It was around $65.