Is the bayonet lug on a No4 barrel integeral or is it a pressed on sleeve simliar to the flash hider on a No5? Reason I ask is I saw a No4 at a gunshow today that had a No1 rear sight bed while still having a No4 front sight and the No4 milled micrometer sight. Nearest I can figure is someone put it on to mount a scout scope. Is it possible to slide the No1 sight base past the lugs? Just something that enquiring minds want to know.


















































