I waited too long as I had never worried about a barrel in the airgun Industry , or PB , But from now on as I buy anything new before I shoot the first time I will clean it , and look down the barrel as this Guantlet is only 31 days old , and I was looking down the barrel to see how shinny it was when my eyes seen a massive manufacturer defect where the it looked like the rifling twisted the wrong way for a inch , or so about 6" down from the muzzle. I have never seen anything like this at least it shoots dime size groups , and same hole groups when I try hard , and breath right. Never again will this happen to me I will Look down that new barrel first.