FastFire on Encore barrel?

[Anchorite]

Sorry if this has been detailed before.... but I am interested in trying out a Burris FF on an Encore pistol - length barrel, but I cannot figure out for the life of me how they would mount to an Encore barrel given the pattern on the barrel. I’ve looked online but the base looks like it couldn’t mate up to the barrel. Unless someone makes a special base? Thanks for any info.

 

[a2x4bbl]

Haven't seen anything like this on line probably because people usually use a weaver rail to mount scopes on Encore . Which you could do with the Fastfire as well , but would be bulky and high . I would make my own . This would be an easy project and you would have something no one else does .