At this point, I would just hose it down with penetrating oil like Kroil or PB Blaster, heck even WD40-cant hurt anything.  you can even get up inside the receiver with the stock broken off. Let it sit a week or more before trying again.
		 
		
		
		
		
		
		
			
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				"How kind it is that most of us will never know when we have fired our last shot"--Nash Buckingham
			 
		
		
		
		
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