LoneJackLarry, a picture as they say is worth a thousand words. I have two of them, tube and clip. The stock is relieved on the charging handle side of the stock but not familiar with any notch. I bought one for my grandson that was unusual in that the front of the stock was widened as if for a target gun and the serial number had an "X" after the ser. #. To be honest I think they probably made changes as they went and tried to gauge acceptance by the shooting public. A picture of your stock would help us try to determine what you have. I must confess to a certain affinity for that model and they still reasonably priced even in like new condition. An overlooked and underappreciated model.