Victor:
I'm not familiar with your particular "morko". 
What does the socket look like?  
Is there any length to it?  
I've seen 14th c. hand-guns with an extended socket that adds 15cm-30cm to the length of the tube; thereby, reducing the need for an additional 15cm-30cm of exposed wood to fill the requirement of 36".  
An additional approach, would be to add a ferrule to the stock, in order to gain length. 
The butt can also have a ferrule, allowing the piece to be spiked into the ground.
There's more than one way to skin a cat 

  Sorry cat-lovers (not really 

).
I have a 26 & 3/8 inch piece of prime 2X2 curly maple that the fish decoy came from. It weighs 3.5 lbs..
I'd like to use it myself for a hand-gun stock but that isn't in my stars (not unless a barrel falls off a truck).
Richard the "Supercivilized" 
