I won't own a Glock, I don't like Glocks, but the most accurate centerfire handgun I have ever had the chance to shoot was a custom-built Glock in 45 acp. It was owned by a fellow IDPA shooter that had served in the Army Marksmanship Unit. It was a long slide with a rifled barrel by Barstow. It had a Trijicon equipped optical sight and a custom trigger that I never got identified. The trigger did NOT have the typical Glock safety lever. The owner hauled it out after an IDPA match and offered it around for us to shoot. I used my handloaded 45 acp ammo and shot it about 50 times at ranges out to 35 yds. Like someone else said, this handgun thought it was a rifle. The owner said it had cost about $2500 to modify and build. I was impressed, but not enough to start my version of this build up. .............