If I'm not wrong, No 1 Mk 3, No 4 Mk1, No 5 have all the same draws pattern inside the fore-end. In a previous posts about the No. 5 fore-end, a gap of 0.010 between the rear of the fore-end and the front face of the butt socket was acceptable. Is the same gap can be apply to No 1 and no 4 too?

Thanks!
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