I always thought the Master Replicas version of the E-11 blaster had a long magazine. On the old MR website and also on the COA of the MR Stormtrooper blaster it says: "...The original 32 round magazine for the submachine gun was shortened to hold three rounds. While many different resin stunt Stormtrooper blasters were used during filming, Master Replicas has recreated the metal hero version based upon the blank-firing submachine gun as used in A New Hope... "
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