Brought home a new to me Gen4 G19 FDE today. Local guy had bought it but polymer isn't his thing so he put it up for sale. He says he put about 800 rounds through it... when I took off the slide to inspect it I would've thought he only put 8 rounds through it. I'm hoping to get to the range tomorrow to test it out and get some pics for you all. I was just trying out the backstraps and I think I like the Medium +2mm strap. The large +4mm was uncomfortable for me. This is my first Glock, my first striker fired pistol, and my first polymer pistol. Prior to this I only owned a Beretta 92A1 (my first gun) which I bought new a few years ago. Any tips on my first Glock or the transition between shooting the 92A1 to the G19?