Armement-test model P-38 with 8 .50s and gunpods didnt see service, nor did the testbed with 6 .50s in the nose (though I've read an account where an 8th AAF pilot claims he shot down Adolph Galland (in a 109D9) with one in a crater or abandoned mineshaft[!] full of wrecked P-38s in the summer of 1944), the one with an extra 20mm, the one with 3 .60mm MGs, the one with a pair of .50s and a pair of .30s, the one with the tailhook (which was never actually tested, just propsed and possibly mocked up), the one on floats (likewise proposed but never built), the one that could drop torpedoes, or the one with a 75mm gun.
The 38s we have are just fine.
