After the spec changed from pin-based to welded-base magazines in mid-1943, did Colt manufacture any of their own welded-base mags? I have not seen a single Colt with a "Colt Manufactured" welded-base magazine on a 1911A1. Did Colt 100% subcontract to the C-L, C-R, C-S mags at this point for the remainder of WWII?