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I would appreciate any suggestions about identifying the slide on this 1943 RR frame. The marking on the left side is "7790314". Thanks for any help.

Ron
745418

745419
 

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A post WWII replacement slide manufactured by Colt. The AA on the left side of the frame indicates rebuild at Augusta Arsenal, where it probably got the slide.

The 7790314 number on the left side was the military part number.
 

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Indeed they were.

The '7790314' slides are replacement parts supplied by Colt through their 'Quality Assurance Program' when no new military contracts were going to be forthcoming after WWII.

They made sure that they got a piece of the pie when the military refurbished war-worn small arms.
 

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Nothing special about the NM slides other than they had reduced internal dimensions to allow fitting to the frame and bushing. The GI slides had loose tolerances to fit on any GI frame they were installed on.
 
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