Unfortunately, my Model 8 was made before they incorporated any firing pin rebound springs. That does bring up an important safety note - many early Model 8's do NOT have firing pin rebound springs, and I got my first and to date only accidental discharge when I let the bolt fly on a chambered round, vs. letting the gun pick the round up from the magazine, thereby slowing down the bolt speed. Luckily, it was lined up downrange while sitting on the benchrest, and it was a cast bullet load, but it woke me up! I tried to retrofit a Model 81 rebound spring, but the firing pin channel didn't have the clearance. As for the two flat magazine side springs, depending on when your gun was made, it may or may not have them, the best way to tell is if the receiver is reileved near the magazine box for them. My .300-Savage Model 81 has them, though. Don't forget, the Model 81 was a product-improved Model 8, with a curved pistol grip, fatter forend, and other changes, but basically the same gun. Just like military semi-autos without firing pin rebound springs, keep that firing pin and bolt clean, and do NOT over-lubricate it, you'll get a sticky firing pin, which is just asking for trouble. Let me know via email if there's anything else I can help you with on your Model 8, they're fascinating guns, John Browning's genius is obvious in their design!
