The .458 SOCOM is a big-bore cartridge designed to function in standard AR-15 upper receivers complete with a standard bolt and magazine. However, in reality, users have found that components designed for use with 5.56 NATO rounds aren't set up for perfect performance with this large-bore cartridge, and so CMMG addressed the issue with its MkW-15 Magazine purpose-built for the .458 SOCOM. Each CMMG MkW-15 Magazine is based on the Lancer L5 Advanced Warfighter Magazine, which was the top choice for shooters of the .458 SOCOM. However, there was room for improvement, so CMMG engineers took the existing magazine design and modified the feed lips to better hold .458 SOCOM rounds without weakening the integrity of the design. Since, at its core, the CMMG-modified Lancer L5 magazine is still a 5.56 NATO mag, users can fit 30 rounds of 5.56 NATO into it, which will function fine. However, the magazine will also provide premium performance when loaded with 10 .458 SOCOM rounds. Due to the many state restrictions on magazine capacity we will not ship these magazines to individuals in the following restricted states: Hawaii, Maryland, Massachusetts, New Jersey, New York, California, Connecticut, Colorado, Washington D.C., Chicago/Aurora/Oak Park Illinois, South Bend Indiana.
.458 SOCOM er en storkaliber patron designet for å fungere i standard AR-15 overbygninger med en standard bolt og magasin. I praksis har imidlertid brukerne oppdaget at komponenter designet for bruk med 5.56 NATO-patroner ikke er satt opp for perfekt ytelse med denne stor-kaliber patronen, og derfor adresserte CMMG problemet med sitt MkW-15 magasin, spesialbygd for .458 SOCOM. Hvert CMMG MkW-15 magasin er basert på Lancer L5 Advanced Warfighter Magazin, som var det beste valget for skyttere av .458 SOCOM. Det var imidlertid rom for forbedring, så CMMG-ingeniører tok det eksisterende magasin-designet og modifiserte matelippene for bedre å holde .458 SOCOM patroner uten å svekke integriteten til designet. Siden den CMMG-modifiserte Lancer L5 magasinet fortsatt er et 5.56 NATO magasin, kan brukerne passe inn 30 patroner av 5.56 NATO i det, som vil fungere fint. Imidlertid vil magasinet også gi førsteklasses ytelse når det er lastet med 10 .458 SOCOM patroner. På grunn av mange statlige restriksjoner på magasin kapasitet, vil vi ikke sende disse magasinene til enkeltpersoner i de følgende begrensede statene: Hawaii, Maryland, Massachusetts, New Jersey, New York, California, Connecticut, Colorado, Washington D.C., Chicago/Aurora/Oak Park Illinois, South Bend Indiana.