I bought a new Glock 19 Last month 10/19/2010 (Brass collected 9/21/2009) and I noticed it has a "1" on the barrel in front of the pentagon symbol. Does that mean it was replaced? I thought I read if Glock replaces a frame they add a "1" after the SN. (Neither of my other 2 Glocks have this) One more Question. I haven't had a chance to fire it yet, but when chambering a round the bullet is hitting the feed ramp straight on. It chambers the round when I let the slide rip, but seems like it wants to hang up when I ride the slide slowly. Is this normal? I only ask because I also have a 23 and 27 and when chambering a round in either of them, the round pretty much slides right into the chamber much smoother. Thanks in advance.