Northrop Grumman's Antares 330 is the latest (and potentially final) member of the Antares line of launch vehicles. Developed in partnership with Firefly Aerospace, Antares 300 replaces the Zenit-derived Ukrainian-Russian core stage of the earlier Antares versions with a new, more powerful stage common with Firefly's Beta/MLV rocket. The new first stage is 4.3 meters in diameter, powered by 9 Miranda engines, and will likely be the largest composite cryotank ever flown when it debuts. The Castor 30XL second stage, interstage, and fairing remain mostly unchanged from Antares 200. Antares 300 will be used primarily to carry Cygnus spacecraft to the International Space Station under the Commercial Resupply Services program, but is available for other commercial and institutional payloads as well

A roughly blocked out Transporter-Erector is also included

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