Anyone know the model of a S&W 1911 with serial# UCF0815

Do you have the original box? Post pictures.

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If you have the fired case envelope or the box end label it should have a 6-digit product code — basically an SKU, that will tell us.

You could also send an e-mail to S&W with your serial number and ask for the date of shipment and the model number/product code.

Most UCF prefixes seem to be 2009-10 timeframe and include both Springfield Ma and Houlton Me production.

Several observed oddities in UCF series so why not a 1911?
UCF0127 - 3914DAO
UCF1824 - CS9 (Silver)
UCF1969 - 3914TSW (and several more in 19xx-20xx range)
UCF2490 - 945-1
UCF2521 - 5906 PC 5 in barrel
UCF9192 - 5946 (Houlton, ME - several other high number 5946)

Cant help you with a specific model - suggestion above to contact SW is your best bet for information.