Guns and Grams (2016) online

Guns and Grams" centers on a father and son, Shorty and Larry Dorsey, who are both involved in the Baltimore heroin trade. After Shorty is gunned down by his Sicilian bosses for attempting to secure new product from Miami distributors, Larry takes over the operation and draws the wrath of the same mobsters, inevitably culminating in a showdown between new and old school gangsters.