[wildman10]

I suppose that depends on which side of the engine you were.

The weight saving of having no guns is irrelevant because all the P51 racers had them removed too. Of course, that doesn't apply to the originals as a fighter is useless without guns and even the photo recce carried them (IIRC one US recce pilot was credited with 13 kills). Incidentally, the USAAF used a large number of UK-built recce aircraft, notably Spitfires and Mosquitos, that did not have guns as they were practically immune from the Luftwaffe until the Me262 jet came along in late 1944; many visitors to the American Air Museum at Duxford in the UK are perplexed when they see the easily-recognisable Spitfire and Mosquito outlined in the glass panels with an opaque profile of every US aircraft lost operating from the UK in WWII.