Hey Cameron, so I got the extended quad rail with the H&K sights. When I recieved it, it is a frikin quality product. I installed it to my Saiga 12, but soon found out that my gas block was canted and the quad rail leaned to one side touching the gas block. I zeroed the set up, but I had to grind material from the bottom of the lower handguard to lower the POI, then shim the front sight block to get it 2 inches closer to POI at 50 yards. I had to drift the rear H&K sights all the way to the right and then grind off more material to get it to hit POI. Needless to say I was very sad. I l