I am not sure what you are asking the Sarco CM9 model CM9BL is a 17 round full size 9mm the CM9 is a Kahr CM9 7 round 9mm

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Hi John, like James... the differences I see "Different Slide Serrations" on the Gen 2 CM9 and different grip design/texture. The Gen 2 CM( also comes with Two Magazines. The CM9BL comes with One Magazine. Not a whole lot of difference other than the Generation update. budsgunshop.com/catalog/product_info.php/products_id/39052/TR+IMP+CM9GEN2+Sarsilmaz+CM9+Gen2+9mm+17rd+3.8+Black%2FBlack

John the differences I see "Different Slide Serrations" on the Gen 2 CM9 and different grip design/texture. The Gen 2 CM( also comes with Two Magazines. The CM9BL comes with One Magazine. Not a whole lot of difference other than the Generation update. budsgunshop.com/catalog/product_info.php/products_id/39052/TR+IMP+CM9GEN2+Sarsilmaz+CM9+Gen2+9mm+17rd+3.8+Black%2FBlack