You can actually get rubber washers from home depot or lowes. The ones that are o-rings from sinks. But they're expensive...... LOL
And yeah, my mad bull SF FH was backwards too, and I found rubber washer at home and then used the locking screw on it.
Thank god for that locking screw.
Btw, Milan, that is one hot rifle man. You didn't even need to paint the VTAC rail! :P it was meant for you.