This is a brand new B&t optics mount for the hk91 it has never been used and all mounting hardware is still in sealed plastic bag included. Has side rail for laser or light. Do your own research and you will see these are highly sought after and unobtainium because they no longer import these into the United States. You may find a few sites that have them listed for back order but the wait time is up 6 months out or longer. This is your chance to get it below MSRP act now before it’s gone!