I never could keep a pipe on a plane...so I devised this home-made one. It's not real fancy...but it's 100% bullet proof.
Just slip the pipe onto the header...then capture the rear with the mount when you slide the wing on....It can't go anywhere.
A couple scraps of plywood, and a piece of hard-wood. The pipe blocks the hard-wood, and it's "pretty" streamlined.

That's a .40 size Cermark F-20, with a Rossi .45 long-pipe.
( yes, it "hauls")

The front is held on with a spring...just like Isaac F's pic....and it doesn't cause any "noise".