Nope, I cut my barrels to fit the r-hop patches. Notice the patch is longer than the window by a fair amount? Just elongate the window. Not quite an er-hop, but still better than the dinky little r-hop in a regular window.
Actually, it is easier for me to be more precise on brass/aluminum (madbull barrels) or even steel than that little piece of rubber...
Actually, it is easier for me to be more precise on brass/aluminum (madbull barrels) or even steel than that little piece of rubber...