Instructions are wrong &doesn't mount - Sylvan Arms AR-15 f/9mm Glock Conversion Block

Up front anybody who says that this works fine in the reviews is either lying or they don't know what they're talking about. But I do because I'm an ex-marine and I know the weapons and how they work. This product will not mount an AR-15 magazine well with the upper installed without modification. Details: First of all the instructions are wrong that say to insert it and then remove a head screw. The head screw sticks over the lip you can't insert it without removing it first. The second thing that's wrong is you just put it in like a normal magazine it says and it clicks in. Wrong. You have to to get this to go in you have to remove the upper and then you have to depress the mad catch and then you can insert it but then you can't get the upper back on. You can't get the butt app or back on because there's this insane fixed spike coming out of the top of it it looks like the head of a slotted screwdriver that runs into your bolt carrier group. I'm going to I'm going to disassemble the top of it and see if I can take that spike this sticking up out and see if it works. Otherwise I'm sending it back.