[Holster for IPSC]

I shoot ipsc with a shadow 2 and want to get a race holster whats the best one out there?

[Open gun upgrades]

Hi I will like to know what kind of upgrades I can do to my STI dvc open to make it faster than what it is I first wanted a akai custom open gun butt in my country they only sell STI guns I want a faster trigger and a metal frame.