I just bought a new Glock for the collection. Its a Gen2 Glock 22. It feels great and I feel like I paid a fair price for it. However, when I got it home and cleaned it I decided to take it out back and shoot it (I mean I bought 500 rounds of ammo just for this gun). And after almost every round the slide locks back. Other than that it ejects great and looked good on the inside. Do you have any recommendations on what may cause this or if there is an armorer in the East Tennessee (Knoxville) area that you'd recommend taking it to.