John;
Is this one of those guns in which you "Pump" the pistol grip rather than the forend. I recall reading an article on these many years ago in a Gun Digest of the period, probably in the 60's. I don't recall a lot about them or if Burgess ever made a more conventional pump, but recall that unique method of pumping.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra