Dear 400 Nitro, can you explain to me the problem of a semi beavertail fore end ? That has me a little worried. Ref the iron sights I am planning one folding leaf that is 2" high at 100 yds and a rear ghost ring aperture that can fold down that is spot on at 50 yds. I have seen a 1950's Purdey .400/.360 (I think that was the calibre) that had one of these and it was spot on. Many thanks for all the input, rgds,Mike Bailey