Derrick IMO the reason there aren't more guns that have been sleeved in the US is that we are a "throw away society". If it's broken and its too much trouble or expensive to get it fixed, just throw it away we can always buy another. Another reason could be that very few Americans know about sleeving after all who is going to sleeve a gun (a semi or pump), that costs way less than half of what it would cost to sleeve it.