Finger grooves and rails, but no LCI. This makes it an early Gen III.
Third generation models
"In the late 1990s, the frame was further modified with an accessory rail (called the "Universal Glock rail") to allow the mounting of laser sights, tactical lights, and other accessories. Thumb rests on both sides of the frame and finger grooves on the front strap were also added. Glock pistols with these upgrades are informally referred to as (early) "third generation" models."
Packed one of these for a couple of years working part time for the US Marshals at the Fed. Court House before my second and final retirement. It was a dream to carry under a suit coat compared to the 4" S&W, model 15s we had previously. I found the caliber to have a snappy recoil being essentially a mini-10MM but the gun was easy to learn, well, maybe a little slow to catch on to the mushy trigger that is the trademark of the Glocks. But good scores were quick to come. Had a chance to buy a 23 for near wholesale a few months back and regret not going for it......breakemall......Bob Dodd