Andre, The butt sockets on the Savage and Long Branch rifles are the same as all SMLE`s. Whereas English No4 butt sockets are completely round[so to speak]. This means an English butt will fit a Savage or Long Branch with out any modifications. Around the other way both the Savage and Long Branch butt sockets need to been reshaped to fit an English made No4. Forends and Handguards are completely interchangeable,between all makes despite there being small changes in all off them.[including factory markings]. Stuart.