Burris ar tactical mount 1/2 inch picatinny riser - Burris AR Tactical Mount 1/2 inch Picatinny Riser

This is solid. I got it to raise my red/green dot up so I could co-witness with my iron sights. I didn't realize when I bought it that it needed to be slid on from either end of the existing rail. That's not necessarily a negative though. I think it makes it more solid. The slight downside was having to take one of the iron sights off to get it on the rail. It may have been worth it in the end. Long story but let's just say it is a good rigid and straight connection between two picatinny rails that meet and could be slightly off - allowing for adjustment before getting it in the final location. Not disappointed in any way.