Take a cheap rifle sling from Dick's or Galyans, and tie it onto your cocker. I wouldn't do it because it would be wierd to shoot and you would be limiting yourself into basically one shooting position but if you want, go for it. I wouldn't be caught dead in one at a Speedball field, but it's your call
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"He who makes a beast of himself gets rid of the pain of being a man." -Dr. Johnson