THE BEST SIDE OF GOLD CUP TROPHY COLT 45

The mag launch button experienced a horizontal line pattern on it, versus the round line pattern located on The existing kinds, see the image below for an example:    The "C" within the barrel would indicate a chrome chamber only barrel. But AFAIK, Colt marked the "C" up near the muzzle on their early barrels, not beneath the handguards. Pic of E