All the ones I've seen were on a #4, that said maybe one of the enfield experts could chime in on mags, bbl threads, tennon etc. and interchangeability between the two.
Cheers
i assume your getting the mag adapters from special interest arms out of the states and if its there kit they are only for the no 4 mk 1 or 2 endfields ive had my eye on building one of there kits on there 45-70 government designs for the no 4 enfield are you able to get any of the carbine stock pistol grip adapters for the enfield actions i would be interested in one at a decent price