Leupold ims mark 4 integral base - Leupold IMS Mark 4 Integral Base

I combined this base with the Leupold IMS Mark 4 1" insert to mount the optic on my 450 Bushmaster AR. I was looking for a solid, well-built mounting system that would stand up to the recoil, provide necessary height and clearance, and readily adapt to the picatinny rail system on my flat-top upper. This base filled the bill in every regard. Comes with all mounting hardware, including the four screws for mating the base to the insert, along with understandable instructions. Quality of the product was obvious upon first exam...typically Leupold. I'm glad I paid the extra money for a mount that I'm completely satisfied with. The mount fit perfectly and works great for my application. I'd buy another without reservation.