Problem with crosman LPA MIM rear sight---help needed

[cvarcher]

My new sight has a problem. The allen key provided for the 2 tiny set screws doesnt fit those screws.It doesnt fit into the head. Those screws are suppose to tighten the sight into the dovetail.Anyone else have this problem??

[MoWog72]

I assume that you have the correct allen key (Sorry, I have to ask.)
From my experience once you have the LPA sight in the dovetail you need to use your thumb to press down on the back of the sight to compress the spring and allow good access to the screws.
I hope this helps.