I have a Blackhawk Omega VI universal fit for my G34. I was going to use a laser or light and then decided against it. The gun fits a little loose without a light but not badly loose. I suspect with a light it would be really fine. This is a heavy piece of equipment so if weight is an issue you might want to consider kydex. And with a thumb break strap it is not real speedy, but is nice and secure.
You can go here and read the reviews. I don't do any room clearing unless it is with a Hoover. My concern is when wandering around in the woods and crawling through brush that the gun and magazines not fall out and get lost. I got an extra mag pouch and they hold the mags in real well.
http://www.opticsplanet.com/reviews/...t-holster.html
I have a Side Armor belt holster that I use for competition. Its nice for that.