I was trying to install my 10/22 into the 90/22 chassis, and when it wasn’t fitting I realized it’s not just a stock receiver. Is this a scope mount or something? I needs to come off, but the screws are quite tight and I don’t want to force something I don’t understand.
If I do take it off, will I need replacement screws or what? Are the screws just for mounting things to the top or are they actually required for the receiver?