Here is a picture / copy of a page showing the four versions that Parker Hale made and sold from the No. 4 Lee Enfield military rifles that they bought. None of these are even close to original military configuration. Note the variations in sights, stocks, scope mounting schemes, metal work changes, butt plates or butt recoil pads, etc.
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Some things that I have found - for the Custom and Supreme models, Parker Hale used stocks made in Italy by a company named "SILE" - usually have that name stamped inside the barrel channel of the fore stock. Those stocks are sometimes still found available for sale, without a rifle. All of the Standard version that I have had were former military stocks and have the markings that a military stock had - from the various makers, although seems to have been a deliberate attempt to remove all former military markings from both wood and metal. I think all actual Parker Hale conversions had the letters "PH" stamped onto the right rear receiver top face - under or just to the rear of the bolt handle - where your right thumb would cover them, from a shooting position. So, is possible to come across No. 4 Sporters, in SILE stocks, that have had similar metal work done as was done by Parker Hale, but do not have that "PH" stamp - more than likely someone's attempt to "make one"...