No, it has its own rail. U can buy an M4 Streamlight light to fit.

I cant say for sure but I think its just a rail of its own kind. From what I've seen/read that only the M4 is the only light that will fit this without an adapter.

I checked out that site you sent me a few days ago. Great pricing but I just don't think I would use a tac light much. I tried to order an Aimpoint mount for my sigma but everyone is out of stock. I called them and they said all machines are making the Shotgun and rifle mounts for hunting season. They said there is a 60day wait. I there a name for the sigma mount???

Here's an adapter for $10:

http://www.nightvisionsales.com/prod...oducts_id/2384



It converts it to a Picatinny/Weaver type rail.

Good luck.

The problem with those "adapters" is that they tend to lower the light/laser away from the frame a bit - making it a bit harder to reach the switches...

Looking for one that I can mount a red dot or holographic sight up top.

That would have to be on top

I know I looking for something like this. But they are sold out. I have found similar one but I'm not sure that they will mount to my Sigma Scoll down to see Sigma mount
http://www.gunaccessories.com/Aimtech/semiauto.asp

I can get you a laser mount for you sigma if interested....