Identify Mag Catch & Flip Safety

Hi Guys need your expertise in identifying the type & maker of this Mag Catch w/ CC over M & Flip Safety w/ marking in a circle. Would these be USGI? TIA:sos:

Link below:

http://i248.photobucket.com/albums/g...7/DSC04827.jpg

http://i248.photobucket.com/albums/g...7/DSC04826.jpg

Commercial Control Co. on the magazine catch(formerly known as National Postal Meter)
William Steinan Co. on the flip safety.

Wern't these late war, or post war replacement parts?

Late war replacement and update parts.

Thanks!!! Gentlemen!!!!!!!!!!!:thup: