Its worth a look even if it isnt real you got it for a fair price and if your happy with it it doesnt matter, anyway fingers crossed its all ok
No. 5 “Jungle Carbine” Overall length 39-1/2 inches; 20-1/2 inch barrel with flash hider. Rubber buttplate; short fore-end. An honest No. 5 rifle (or “Jungle Carbine”) has lightening flutes cut in the barrel knox form and extensive milling done to the receiver to lighten it. (Take the handguard off and look for the barrel flutes.) Also, an honest No. 5 will be electro-engraved “No5MKI” on the left side of the receiver and will not have “No. 4” stamped or engraved anywhere on it. In addition, an honest No. 5 will bear the proper manufacturer’s code: “(ROF)F” for Fazakerley or “M47C” for BSA-Shirley. Finally, the barrel band will be only 8 inches in front of the receiver ring--rather than 10-3/4 inches as on a No. 4 rifle. In the 1950s and 1960s, Golden State Arms Co. of Pasadena, California modified quite a few No. 4 rifles by shortening the barrels, adding flash hiders, and shortening the fore-ends. Some were equipped with Fajen or Bishop sporter stocks, as well. These were called various names, such as “No. 4 Jungle Carbine,” or “Santa Fe Mountain Carbine,” or “Mountain Rifle,” but all have “Golden State Arms” and “Santa Fe” roll-stamped on the barrel. Nice aftermarket conversions, but strictly that. Currently, Navy Arms is doing the same thing with No. 4 rifles and selling them as “No. 5 Jungle Carbines.” At arm’s length they look genuine, but they have standard No. 4 rifle markings and DO NOT have the lightening flutes on the barrel or the lightening cuts on the receiver. These are strictly fakes--or thinly disguised “replicas.”