A local shop got in some of the Safariland GLS holsters. Unfortunately, their purchasing person ordered every last one of them in coyote brown and a green color. For CCW, this wouldn't be a big deal, but it is a no go for wearing with a uniform; so, the boss and I each have one in black on order.
They are very noticeably thinner than the ALS holsters, and hug more tightly to the body. As such, they are more concealable.
I found the retention device to be faster than the ALS and easier to manipulate with a support hand draw.
Unfortunately, a straight drop does not appear to be available.