Thanks for the input. I have tried the chock both ways...both right and wrong. When I put the chock into place, the flat side will not fit properly when the angle side fits and vice versa. I thought it was just my 'fat fingering', but regardless of which way it goes in, the screw is not long enough to engage the threads. I will call the distributor that I bought it from tomorrow and talk to him and see if I can get any further guidance or a replacement. I tend to believe that it may be a variance with the weapon vice a faulty part...