No Go! (1973)

This man is not an actor. This gun is not a prop.

Docudrama about IRA in Derry's Bogside/Creegan areas - begins with British setting up of Northern Ireland in the 1920s "which made n*ggers out of the Catholic minority" there; mentions the split of the IRA into the Provisional ("Provo") faction, which called for conventional uprising to gain independence, and the Official faction, which was strongly Marxist.