Worthless. - Sun Optics SKS Receiver Tactical Mount

I got the scope mount it has no back to it. There was no back in the package just a bag of screws and small parts. There is nothing to hold the spring from come out of the back. When, I removed the spring cover at the back of the SKS it has a block which keeps the spring from coming out and to have something to push against when being cocked under pressure. This mount like I said has no back, and no back to put on it.