Nine Ball Hi-Capa mount base
 

http://www.redwolfairsoft.com/redwol...l?prodID=16586

This one. I'm wondering if it will mount to any railed frame pistol or just the Hi-Capa?

not too sure how it works, but it looks to be pickup up on the rail in that pic, and perhaps the set screws are to secure it. So it "should" work with any 20mm rail....

I think it's similar to the P99 base, not exactly but similar.

Here's the real question though, what purpose will this serve? Are you sure that it will after installation still fit your holster? Personally I've never liked scopes, even RDS sights on pistols, ((save for maybe a Samurai fit directly to the slide)) because mounts like these tend to really off balance a pistol. The strike plate alone surprisingly will off set balance by more than you'd expect.

If you are making a race gun than that wouldn't matter. Race pistol holster pretty much clips only on the trigger guard...

True, but just want to make sure the guy has thought of this ;)

Oh yes, a racegun it is...I just bought a WA blademaster III off the forums. And I had considered something like a J-point or Doctor RDS mounted right to the slide, but decided on a full size RDS so i can move it between my AEG and this thing.