to MY old eyes the gun looks like a later SIG D/A with the rounded hammer, in the "at rest" position. Snipes' finger looks to be all the way to the rear of the trigger-guard, which would mean he had to to drop the hammer on an empty chamber.
Unless I'm blind.
By the way, what'hell has he got slung? I haven't seen this movie in ages and don't recall what they were using for long guns, but it almost looks like a scoped rifle from the rear. I'd have expected to see a barrel sitcking up, down or somewhere.