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No because the bigger magazines are double stacked.

6+1, 7+1, 10, 13 and 14 roud

the 7+1 should not be much of a problem carrying but a 10 or 14 round will extend a good bit out of the bottom of the gun making it harder to conceal I only know of the 6, 7 ,10,13 and 14 round magazines

found a 15 round single stack ProMag Ruger LCP, .380 ACP Magazine, 15 Rounds UPC: 708279008993 https://www.sportsmansguide.com/product/index/promag-ruger-lcp-380-acp-magazine-15-rounds?a=1003616