Hello Guys. I have a black Gobblestopper red/green dot sight on a Sun Optics mount for sale. It came off a Browning Gold 3.5 12 gauge. It will fit an SX2, SX3 and FX3. Never been in the field, was shot at the range. I got an SX3 and do not need 2 sights. Price to your CONUS address is $70, standard USPS ground shipping.