Hi Baz,

I picked up a PhotoSniper (and all the extra's) several years ago and have, on occasion,
used it with my Pentax DSLR with very good results which, granted, you weren't asking
about, but...

As to the legalities and, even though I am in Vancouver, I took it
out to a few events with up to 50K people in attendance and the only police attention it
was received was from officers who were interested in photography and asking the usual
"make/focal length, speed" questions

The only people with any "negative-oriented"
comments were from people who should have been more worried about the police presence
rather than my camera and lens(es)

But I would hesitate to take it on any trips where you are going by plane simply because when
going through any x-rays because what you see is quite innocent -- see here:

but here it is as seen by the security/x-ray people:

Cheers and Yep, I flipped the pic ...but purely compositional purposes

Jack