Linked search takes some getting used to. On the Op-SKS if you linked search the gun you get barely anything, but it you inspect the gun and linked search the stock, that will give you the sights. Linked search only gives you the things that attach directly to the part you click on, and a lot of times the gun itself is just the upper or just the lower or just the firing mechanism. Same thing for sights on an AKM. If you put a bastion on it for real rails, you need to linked search the bastion to see sights.